A playable pre-alpha build of Ion Boost Racing is available here: ionboostracing.com/play-the-game/
It supports online multiplayer for up to 4 players, or you can play solo. Make sure to try it out and send me some feedback!
Please keep in mind this is a pre-alpha build, everything is a work in progress. Every aspect of the game will be evolving and improving throughout development. The Unity Web Player must be installed in order to play.