
Millionaire Quiz
Millionaire Quiz is a virtual twist on the classic TV game show, challenging you to answer 15 increasingly tough questions for a shot at the million-dollar prize. To win, you must correctly navigate through questions from various categories, each more challenging than the last. If you find yourself stumped, use lifelines to increase your chances. Miss a question, and it's game over—good luck!
Release Date
December 2016
Platform
Web browser (desktop and mobile)Controls
Press the left mouse button to choose an answer.
Game Information
- Category
- Casual Games
More Games
ToT or Trivia
ToT or Trivia is a quiz game featuring and game modes. In both modes, you must answer correctly to climb the money ladder. Use your prize money to buy skins in the shop and have fun answering the quiz questions!
How to Play
This or that
In this or that, you get a question and two options. To get the answer correct, you must choose the option that is most popular among all contestants.
Trivia
Trivia mode is a classic general knowledge quiz featuring questions about anything from games, music, and art to politics, sports, and geography. See if you can climb all the way to 10k without getting an answer wrong!
Helpers
If you’re stuck, you have three lifeline options. You can skip to the next question, see what half of the audience has answered, or refresh the question. Each lifeline is usable three times to start, and you can unlock more using the golden keys.
Features
General knowledge quiz with various questions
Guess the most popular answer in this or that
Three lifelines to get you out of tricky situations
Buy various skins for your character using your prize money
More Games Like This
Do you enjoy testing your knowledge in a bit of trivia? You might enjoy the Google guessing game Google Feud or the popular trivia game Trivia Crack.
Release Date
June 2022
Developer
Yso Corp made this quiz game. Ninja Hands and Wood Cutter and two more popular games from this developer.
Platforms
Web browser
Android
iOS
Controls
Use the left mouse button to choose the answer.FAQHow difficult are the questions in ToT or Trivia?The questions in both game modes are quite easy overall, and suitable for a younger audience.How do I win ToT mode in ToT or Trivia?You must guess correctly until the end, or save yourself with a rewarded ad to continue.Gameplay Video
How to Play
This or that
In this or that, you get a question and two options. To get the answer correct, you must choose the option that is most popular among all contestants.
Trivia
Trivia mode is a classic general knowledge quiz featuring questions about anything from games, music, and art to politics, sports, and geography. See if you can climb all the way to 10k without getting an answer wrong!
Helpers
If you’re stuck, you have three lifeline options. You can skip to the next question, see what half of the audience has answered, or refresh the question. Each lifeline is usable three times to start, and you can unlock more using the golden keys.
Features
General knowledge quiz with various questions
Guess the most popular answer in this or that
Three lifelines to get you out of tricky situations
Buy various skins for your character using your prize money
More Games Like This
Do you enjoy testing your knowledge in a bit of trivia? You might enjoy the Google guessing game Google Feud or the popular trivia game Trivia Crack.
Release Date
June 2022
Developer
Yso Corp made this quiz game. Ninja Hands and Wood Cutter and two more popular games from this developer.
Platforms
Web browser
Android
iOS
Controls
Use the left mouse button to choose the answer.FAQHow difficult are the questions in ToT or Trivia?The questions in both game modes are quite easy overall, and suitable for a younger audience.How do I win ToT mode in ToT or Trivia?You must guess correctly until the end, or save yourself with a rewarded ad to continue.Gameplay Video

Motherload
Motherload is a classic mining game where you dig deep into the ground of an alien planet to mine various raw materials. This addictive title was released in 2004 using Flash, but you can play it here in HTML5.
How to Play Motherload
Mine deep into the ground
Your mission is to mine resources, bring them back to the mineral processing plant, and sell them.
Refuel and sell your minerals
Initially, your mining vehicle won’t be able to travel far, and you’ll need to resurface frequently to refuel and sell your resources.
Upgrade your capabilities
You can purchase various upgrades to your fuel tank, cargo capacity, drill, engine, hull, and radiator using your earned money. You’ll find these at the junk shop. Beside this shop is the emendation station where you can get your hull repaired. You can also purchase one-off items like spare fuel tanks and explosives here.
Find rare artifacts and resources
Once you’ve made some upgrades, you’ll be able to travel deeper into the ground safely, where you’ll find more valuable minerals like platinum and emeralds. Once you hit roughly -1000 ft, you’ll also find religious artifacts that instantly grant you $50,000.
Motherload Tips
There are precious resources the deeper you go, like religious artifacts - so focus on getting there as quickly as you can
Use backup fuel tanks to prolong your mining expeditions
Use your flying ability to avoid fall damage
Running out of petrol makes you explode, so think carefully about how far you travel
More Games Like This
Enjoy playing classic web games? Check out our Flash games section for an extensive selection of the finest Ruffle-emulated Flash titles. Some of the most popular titles include Papa's Pizzeria, Stick War, and World's Hardest Game.
Release Date
2004
Developer
Motherload is made by XGen Studios. The Steam version is available as Super Motherload.
Platform
Web browserControls
Dig: press ASD or left, down, and right arrow keys
Fly up: hold W or up arrow key or left mouse button
How to Play Motherload
Mine deep into the ground
Your mission is to mine resources, bring them back to the mineral processing plant, and sell them.
Refuel and sell your minerals
Initially, your mining vehicle won’t be able to travel far, and you’ll need to resurface frequently to refuel and sell your resources.
Upgrade your capabilities
You can purchase various upgrades to your fuel tank, cargo capacity, drill, engine, hull, and radiator using your earned money. You’ll find these at the junk shop. Beside this shop is the emendation station where you can get your hull repaired. You can also purchase one-off items like spare fuel tanks and explosives here.
Find rare artifacts and resources
Once you’ve made some upgrades, you’ll be able to travel deeper into the ground safely, where you’ll find more valuable minerals like platinum and emeralds. Once you hit roughly -1000 ft, you’ll also find religious artifacts that instantly grant you $50,000.
Motherload Tips
There are precious resources the deeper you go, like religious artifacts - so focus on getting there as quickly as you can
Use backup fuel tanks to prolong your mining expeditions
Use your flying ability to avoid fall damage
Running out of petrol makes you explode, so think carefully about how far you travel
More Games Like This
Enjoy playing classic web games? Check out our Flash games section for an extensive selection of the finest Ruffle-emulated Flash titles. Some of the most popular titles include Papa's Pizzeria, Stick War, and World's Hardest Game.
Release Date
2004
Developer
Motherload is made by XGen Studios. The Steam version is available as Super Motherload.
Platform
Web browserControls
Dig: press ASD or left, down, and right arrow keys
Fly up: hold W or up arrow key or left mouse button
🔥 Hot Game
Stack Colors
Stack colors is a hypercasual game where you move side to side to collect colored blocks. Stack as many colors as possible and kick them over the finish line with as much force as you can for a big reward multiplier!
How to Play
Swipe to collect
Swipe your character left to right to line them up with the correct color. You can only pick up blocks that are the same color as those you’re holding. You lose blocks and your fever progress if you step on the wrong color.
Go into a fevered frenzy
Keep stacking the correct color without any mistakes to go into fever mode. In fever mode, everything is the same color, and you can pick up all the blocks in one! Obstacles are also removed, so you’re basically an invincible color-collecting machine for a brief period.
Launch your colors
Pick up as many blocks as possible and tap quickly toward the finish line to kick your blocks into the distance. The more blocks you have, and force you use, the further they will go.
More Games Like This
Plenty more fun and simple hypercasual games are in our casual games section. If you enjoyed Stack Colors and want to play something similar, check out Bucket Crusher and Helix Jump from the same developer.
Features
Intuitive gameplay
Collect colored blocks
Avoid the wrong color
Build your score
Release Date
March 2020 (iOS)
June 2020 (Android)
February 2023 (HTML5)
Developer
Stack Colors! is developed by Voodoo.
Platforms
Web browser (desktop and mobile)
Android
iOS
Controls
Drag the left mouse button to move the character to the left or right.
How to Play
Swipe to collect
Swipe your character left to right to line them up with the correct color. You can only pick up blocks that are the same color as those you’re holding. You lose blocks and your fever progress if you step on the wrong color.
Go into a fevered frenzy
Keep stacking the correct color without any mistakes to go into fever mode. In fever mode, everything is the same color, and you can pick up all the blocks in one! Obstacles are also removed, so you’re basically an invincible color-collecting machine for a brief period.
Launch your colors
Pick up as many blocks as possible and tap quickly toward the finish line to kick your blocks into the distance. The more blocks you have, and force you use, the further they will go.
More Games Like This
Plenty more fun and simple hypercasual games are in our casual games section. If you enjoyed Stack Colors and want to play something similar, check out Bucket Crusher and Helix Jump from the same developer.
Features
Intuitive gameplay
Collect colored blocks
Avoid the wrong color
Build your score
Release Date
March 2020 (iOS)
June 2020 (Android)
February 2023 (HTML5)
Developer
Stack Colors! is developed by Voodoo.
Platforms
Web browser (desktop and mobile)
Android
iOS
Controls
Drag the left mouse button to move the character to the left or right.
Design House Escape
Design House Escape is an escape game where you must navigate through a series of challenging rooms in a mysterious house. Use floor plans and models to strategize your escape. Every corner holds secrets and obstacles to overcome. Can you unravel the mysteries and find your way out?Release DateFebruary 2024 (Android, iOS, and WebGL)PlatformsWeb browser (desktop and mobile)AndroidiOSControls
Use the left mouse button to solve the puzzles and escape from the room.
On the list of items, you can tap an item and select it. Then, you can use the item you selected by tapping the room.
After selecting an item, you can click the button of a magnifying glass and search it in detail. At this time, you can use the other item for it or combine the other item with it.
Use the left mouse button to solve the puzzles and escape from the room.
On the list of items, you can tap an item and select it. Then, you can use the item you selected by tapping the room.
After selecting an item, you can click the button of a magnifying glass and search it in detail. At this time, you can use the other item for it or combine the other item with it.
Scary Horror Escape Room
Scary Horror Escape Room is a creepy escape room game set in a mysterious place. Solve tricky puzzles and escape the place alive!
Release Date
November 2019 (Android and iOS)
October 2022 (WebGL)
Developer
Arpaplus made this game.
Platforms
Web browser (desktop and mobile)
Android
iOS
Last UpdatedOct 05, 2022Controls
Use the left mouse button to interact with the objects and follow the in-game tutorial.
Release Date
November 2019 (Android and iOS)
October 2022 (WebGL)
Developer
Arpaplus made this game.
Platforms
Web browser (desktop and mobile)
Android
iOS
Last UpdatedOct 05, 2022Controls
Use the left mouse button to interact with the objects and follow the in-game tutorial.

Tap-Tap Shots
Tap-Tap Shots is an addictive sports game in which you continuously tap to make your basketball jump. It is an endless basketball practice where you aim to get your ball in the net in one shot. The goal is to keep playing until you can't anymore, so you may want to cancel all plans for the evening. Perfectly time your taps to score before the clock runs out, and keep going as long as you can!How to Play Tap-Tap ShotsThe gameplay in Tap-Tap Shots is pretty straightforward: it is a one-button game where each click propels your ball. Depending on your tap, your ball may or may not make the shot.The net moves to a different height and location each time you make the shot. This will test your click skill. The game, in essence, is an endless series of rounds of practice shots. Your best scores are tallied, incentivizing you to improve upon your performance in the last round.The key to the game is to find the right rhythm when tapping, hence the name tap-tap. How many taps do you need to make every shot?Tap-Tap TipsKeep tapping to move the ball slightly until it reaches the net. If you miss, the ball will come back from the other side.When you score, another net is created in a new location: an endless cycle until you run out of time!Time your shots carefully and think fast before you run out of time. If you miss, it’s best to click quickly to get back around and try for another shot, but make sure you don’t overshoot again!Get “On Fire”When you score a few baskets in a row, the ball will become hot and burst into flames. This is an indicator of a successful scoring streak, as well as a way to score bonus points. You can additionally get bonus points for clean shots that don’t touch the rim.More Games Like ThisFor more basketball games, have a shot at popular titles in our sports category, such as Basketball Stars, which brings fast-paced, one-on-one action. If, instead, you want to try something different and enjoy simple, fun games, check out our hypercasual or one-button games for more. Popular games include Geometry Dash, Sprunki, and Little Alchemy.Release DateMarch 2018 DeveloperMaximiliano Demonte developed Tap-Tap Shots.PlatformsWeb browser (desktop and mobile)Controls
Left-click to dunk.FAQWhat is the best device to play Tap-Tap Shots on?Since the game features simple one-click mechanics, it works just as well on mobile and desktop devices.How many lives do you have in Tap-Tap Shots?You have unlimited lives, but each shot is timed. If you run out of time without scoring, it's game over.Gameplay Video
Left-click to dunk.FAQWhat is the best device to play Tap-Tap Shots on?Since the game features simple one-click mechanics, it works just as well on mobile and desktop devices.How many lives do you have in Tap-Tap Shots?You have unlimited lives, but each shot is timed. If you run out of time without scoring, it's game over.Gameplay Video

Drift Hunters
Drift Hunters is a free-to-play car 3D game that lets you experience the art of drifting with an impressive range of tuned-up cars and dynamic tracks. Choose from a wide selection of customizable rides, fine-tune your engine, and hit the gas as you glide around corners and perfect your drift technique in 10 unique and challenging locations. Get ready to leave your mark on the asphalt, literally!How to Play Drift HuntersYou start Drift Hunters by selecting your car and the type of ride you want to take. You can upgrade the performance, including the brakes, weight, gearbox, turbo, and engine, with superior parts. You can also finish off your car in any color and enjoy a selection of rims on the house. The key to this game is scoring points by drifting your car. The more you drift, the more points you get, which you can then spend in the garage to fine-tune your car. Race Tracks: Drift through diverse circuits like Nishuri, Stadium, Tyshen, and more. Each track offers a unique layout with varied curves and turns, challenging your drifting skills to the max.Cars: Rack up at least 8,500 points to start unlocking cars, with the top model costing over 134k points. Every drift and upgrade gets you closer to that dream ride! If you are a beginner, you might find that it is better to focus on optimizing the performance of entry-level cars before investing all your cash on a new ride.Drift Hunters available cars:BMW M3Toyota SupraHonda S2000Ford Fiesta STNissan 370Z coupeDodge Challenger HellcatNissan GTRPorsche 911 GTAnd 18 more cars...Parts & Upgrades: Customize your vehicle’s performance with upgrades to brakes, weight, gearbox, turbo, and engine.Tuning: Adjust your car’s fine-tuning settings, including front and rear camber, offset, brake balance, height, and brake pressure, to perfect your drift style even without additional upgrades.Visuals: Express your style by customizing the color of your car’s body and rims, and select from a range of rim designs to complete your look. Every car you buy can be fully tuned: turbo, brakes, engine, gearbox and weight can range from "street" level, the lowest, to the "pro", which is also the most expensive. You can fully modify these values to find the best tuning for your drift performance.Some tracks allow you to keep drifting much more easily than others. The best tracks for drifting in Drift Hunters are Emashi and Forest because of their long corners and lack of too many sharp turns. The Forest track features the longest corners, allowing for the most prolonged drifts.The longer you drift, the more your points multiplier increases. You can use the points to buy exotic motors like the high-performance Porsche 911 GT. There are 26 fully customizable cars available to buy in total. Drift Hunters has a smooth arcade-racer feel but isn’t constrained to a racing format. Instead, you can blaze your own trail in several locations, racking up points to buy new cars and upgrades. The graphics are great for the web, but you can play the game on low-spec devices without a hiccup. It’s a must-play for drift enthusiasts!TipsUse acceleration cautiously when approaching corners mid-driftDrift from side to side on straight roads to keep the drift aliveTune up your vehicles to find the sweet spot for maximum driftDrive on maps with plenty of space for long, uninterrupted driftingMore Games Like ThisDriving games are super addictive when they're as good as Drift Hunters. Especially when you can play them in your web browser for free, without needing to download anything. For more fun, try some of our popular games like Moto X3M, a bike game that combines high-speed thrills with a test of precision and timing across 22 adrenaline-filled levels, or Eggy Car, where your mission is to drive while keeping an egg intact. Browse our drifting games and car games for more!Features26 fully customizable cars to drift around the tracksTen unique locations, including racetracks and city streetsDetailed car tuning lets you modify all aspects of your vehicleBrowser-based game with excellent adjustable 3D graphicsPlatformsDrift Hunters can be played for free in your web browser using full screen, theatre, or regular mode. It can also be played on mobile devices (Android and iOS).Game DeveloperThe game is made by Studionum43 (Ilya Kaminetsky). You can support this game here.ControlsUse the WASD or arrows keys to steer the carUse the space as the handbrakeUse C to change the camera positionUse left shift to shift up gearsUse left Ctrl to shift down gearsFAQHow to change gears in Drift Hunters?To change gears in Drift Hunters, use the left shift key to shift up and the left control keys to shift down gears.What is the most expensive car on Drift Hunters?The most expensive car in Drift Hunters is the Porsche 911 GT (993).What is the fastest car on Drift Hunters?The Nissan GT-R (R25) is the fastest car on Drift Hunters.Is Drift Hunters free-to-play?Drift Hunters is fully free-to-play on desktop, Android and iOS. It can be found on CrazyGames.Gameplay Video
Demolition Derby 2
Demolition Derby 2 is an adrenaline-fueled driving game that puts you behind the wheel in a high-stakes battle for survival. Inspired by the chaotic excitement of demolition derbies across the globe, this game challenges you to smash, crash, and obliterate your rivals’ cars in a brutal quest for victory. Each match is a no-holds-barred competition where strategy meets sheer mayhem. Whether you’re slamming into opponents at full speed or maneuvering through wreckage to deliver the final blow, the intense action and bone-crushing collisions keep you on the edge of your seat. The goal is to outlast your competitors and reign supreme.How to Play Demolition Derby 2In Demolition Derby 2, your main objective is to survive the carnage by obliterating your opponents’ cars before they destroy yours. Jump into the driver's seat and start with a test drive to get yourself into the car of your choice. Practice both your offensive and defensive tactics so you can cause the maximum damage with minimal damage to your own vehicle. You will start with the Tiny Classic car. Doesn't sound too intimidating, but you will need to work your way up to upgrades through various rides and crashes. The more damage you deal, the longer your gameplay and the better the rewards. There are six classes of cars to choose from. You will begin in class 0, but with a bit of practice and a lot of teeth-gritting, you can slowly work your way to unlocking upgrades to truly feel the power of vehicular destruction.Demolition Derby 2 Car ClassesClass 0Tiny ClassicCompact Retro, 2,000 coinsTrio, 7,500 coinsCompact Sport, 18,000 coins38 Hotrod, 20,000 coinsApollo, 25,000 coinsJinn, 100,000 coinsClass 1Oramak Classic, 12,500 coinsMullaro Classic, 20,000 coinsMarshal, 22,500 coinsCommander, 18,000 coinsZegato, 25,000 coinsRocketeer, 30,000 coinsHavana, 20,000 coinsBandit Classic, 30,000 coinsClass 2Casino Retro, 5,000 coinsVictora Taxi, 10,000 coinsDuke Classic, 15,000 coinsDuke Wagon, 17,500 coinsClassic Taxi, 20,000 coinsStranger, 30,000 coinsPolice Car, 40,000 coinsSedan, 40,000 coinsClass 3Howler, 18,000 coinsBovidae, 19,500 coinsDecagon Full, 20,000 coinsDecagon Pickup, 30,000 coinsVan, 30,000 coinsSUV, 25,000 coinsHammer, 30,000 coinsClass 4Kitt Retro, 7,500 coinsStockcar Retro, 25,000 coinsColt, 23,000 coinsStinger Classic, 25,500 coinsFury, 40,000 coinsThunder, 40,000 coinsVolusia, 25,000 coinsSuper, 50,000 coinsLanvo, 50,000 coinsWraith, 35,000 coinsClass 5Velocità, 27,500 coinsRapidità, 28,500 coinsGurney Classic, 32,000 coinsDrakester, 30,000 coinsStuttgart, 33,000 coinsLagoon, 35,000 coinsFoudre, 50,000 coinsVenom, 40,000 coinsRebel, 50,000 coinsStar, 50,000 coinsSpecialSchool Bus, 30,000 coinsSemi Truck, 40,000 coinsEuro Truck, 50,000 coinsSleigh Ride, 25,000 coinsTank, 100,000 coinsForklift, 50,000 coinsMore Games Like ThisThere are plenty more racing games in our driving games category, so look and get behind the wheel of another challenge, such as Moto X3M or Drift Hunters, two thrilling racing games.FeaturesFree Drive modeDemolition Derbies and RacesPolice Chases50+ Unique Cars60+ Racing Tracks and Demolition ArenasRelease DateMay 2017 (Android)June 2017 (iOS)August 2024 (WebGL)PlatformsWeb browserAndroidiOSLast UpdatedApr 21, 2025ControlsWASD / arrow keys = driveShift = boost (when NOS is already bought)C = change cameraFAQWhen did Demolition Derby 2 come out?Demolition Derby 2 came out in August 2024 and was developed by BeerMoneyGames.Where can I play Demotion Derby?You can play Demolition Derby 2 and Demolition Derby 3 at CrazyGames.Gameplay Video
Parking Jam
Parking Jam is a challenging puzzle game where you untangle a crowded parking lot one car at a time. Use your logic and problem-solving skills to move vehicles in the correct order, clearing the way without causing chaos. With each level, tackle increasingly complex puzzles filled with more cars and tricky obstacles.
How to Play Parking Jam
Everyone's been stuck in a parking jam, but the real challenge is figuring out how to escape!
This is a satisfying puzzle game where you click and drag cars to clear them from a crowded parking lot and onto the street. As you progress through the rounds, the difficulty increases, with road barriers and tighter spaces making it harder to maneuver the vehicles. Careful planning is key to getting all the cars out.
Cars can be moved in reverse, allowing for different strategies to clear the jam. Each puzzle comes with a limited number of moves, so you’ll need to think ahead and use them wisely. Your score also reflects how many players have successfully solved the same parking jam, giving you a sense of the challenge level.
Some levels, like Level 11, are especially tricky due to the sheer number of cars blocking the way. Can you navigate through the toughest jams and free up the lot?
More Games Like This
Buckle up and keep your eyes on the road. You can continue on your journey with some of our most popular driving games like Drift Hunters, a 3D game that gives you experience in the art of drifting with an impressive range of tuned-up cars and dynamic tracks; Mr Racer, where you can speed through busy streets on your way to victory; or Moto X3M, a bike game that takes dirt bike racing to a whole new level.Controls
Click and slightly drag the cars in the direction you want them to get out of the parking lot.FAQHow do you play the car jam game?Parking Jam is a puzzle game where you click and drag cars to clear them from a crowded parking lot, getting the cars out of gridlock and onto the streets.Is Parking Jam a real game?Parking Jam is indeed a real game and can be played online for free at CrazyGames.Gameplay Video
How to Play Parking Jam
Everyone's been stuck in a parking jam, but the real challenge is figuring out how to escape!
This is a satisfying puzzle game where you click and drag cars to clear them from a crowded parking lot and onto the street. As you progress through the rounds, the difficulty increases, with road barriers and tighter spaces making it harder to maneuver the vehicles. Careful planning is key to getting all the cars out.
Cars can be moved in reverse, allowing for different strategies to clear the jam. Each puzzle comes with a limited number of moves, so you’ll need to think ahead and use them wisely. Your score also reflects how many players have successfully solved the same parking jam, giving you a sense of the challenge level.
Some levels, like Level 11, are especially tricky due to the sheer number of cars blocking the way. Can you navigate through the toughest jams and free up the lot?
More Games Like This
Buckle up and keep your eyes on the road. You can continue on your journey with some of our most popular driving games like Drift Hunters, a 3D game that gives you experience in the art of drifting with an impressive range of tuned-up cars and dynamic tracks; Mr Racer, where you can speed through busy streets on your way to victory; or Moto X3M, a bike game that takes dirt bike racing to a whole new level.Controls
Click and slightly drag the cars in the direction you want them to get out of the parking lot.FAQHow do you play the car jam game?Parking Jam is a puzzle game where you click and drag cars to clear them from a crowded parking lot, getting the cars out of gridlock and onto the streets.Is Parking Jam a real game?Parking Jam is indeed a real game and can be played online for free at CrazyGames.Gameplay Video
Solitaire Crime Stories
Solitaire Crime Stories is a casual solitaire game where you delve into the mysteries of Springdale, a seemingly tranquil town hiding dark secrets. Join journalist Lana Whitt and her assistant Bill as you solve crimes by mastering Solitaire. Explore unique locations, meet intriguing characters, and unravel the town's enigmatic puzzles. Plus, enjoy bonding with Max, the adorable kitten companion, in between investigations. Ready to become a Solitaire master and detective extraordinaire?Release DateApril 2022 (iOS)May 2022 (Android)February 2024 (WebGL)PlatformsWeb browserAndroidiOSControls
Use the left mouse button to play the game.
Use the left mouse button to play the game.