this is a cute lil game!! if you're willing to hear out my suggestions, i feel like it might actually look a bit better without antialiasing, and it'd be cool if the marbles had a bit more of an impact on eachother. so you could bump them into obstacles to slow them down, or have them hit you from behind on purpose to get a boost. you can already kind of do this, but it feels more like they're rubbing on eachother than actually bouncing off. anyway, really cool, keep it up!

Not too bad! I think the AI could have been more challenging though, it was super easy winning the races.
I like the smile on the marble. It's cute. :)