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Free Online Marble Race Simulator
How to Start a Marble Race
Roulette Rush runs marble races in your browser. Enter at least two names, one per line or separated by commas, choose a map, and press Start Race. Each entry becomes a labeled marble. The first marble across the finish line is the winner.
Choose a Course
Try Wheel of Fortune, BubblePop, Night Run, Plinko Neon, Pinball Arena, or Galaxy Spin. Each course has its own layout of obstacles. Use the 1x, 2x, or 3x controls to change playback speed, or reset to choose another course.
Names and Multiple Entries
Race up to 500 marbles. Use a name once for one marble, or write Alex*3 to add three marbles with the same label. The 500-marble limit includes these repeated entries; entries beyond it are not raced.
Share a Race Setup
Use Copy race link to send your names and selected map to a friend. Opening the link loads that setup for a new race. It does not replay the original result. Your last names and map are also saved in this browser when storage is available.
Follow the Finish Order
Watch the rankings update as marbles finish. For a complete order, let every marble finish before resetting or ending the race. You can use that list for game turns or manually assign teams using the guide below.
How the Simulation Works
The Matter.js engine simulates movement and collisions while marbles travel through the course. This is a game simulation: equal numbers of marbles do not guarantee equal winning probabilities, and results are not audited random draws.
500 Marbles
Support for massive races with up to 500 simultaneous entries
No Sign-Up
Start instantly. No account, no login, no registration required
Mobile Ready
Fully responsive on phones, tablets, and desktops with touch controls
100% Free
Completely free to use for personal and commercial purposes
More Ways to Use Roulette Rush
Team Assignment Guide
Run a race, then manually distribute participants into teams using the finishing order.
Giveaway Winner Picker
Replace the sample names with your entrant list and watch the winner cross the finish line.
Yes or No Picker
Start with Yes and No already entered, or replace them with your own choices.
Random Number Generator
Start with numbers 1 through 10, or paste your own list of up to 500 numbers.
Coin Flip
Race one Heads marble against one Tails marble for a coin flip alternative.
Who Goes First
Enter each player once and use the completed ranking as your turn order.