SonicBoom is a multiplayer (and quite neon) take on the Snake genre of games. Start off small, but by eating up loads of colorful blocks, your tail will grow, and grow, and grow. But you're not alone in this. There are dozens of other snakes trying to maze their way around the map. So expect a veritable maze of colorful snake tails.
Move your snake around with WASD, and use your sonic boom ability to give yourself a temporary speed boost with space.
Plan your moves ahead. That'll go far to help you avoid ramming headfirst into your own tail. That's the most embarrassing way to go out in games such as these.