pi: Play Basic, if you look at the windowtitle.
Indigo: very nice. I like the look of the game (actually, I like your work in general) it's colorful but also in a refreshing way. The game, well nice for a 72h game but it actually lacks gameplay. The control is definitely something you should improve and perhaps the speed. To make the game more fun, I would recommend the ai-cheat-player-advantage way. Make the AI slightly faster (not as fast as the always-#1-cart though, that guy was sick), but give the player the advantage of using boosts and shortcuts that require skill, while the AI is just doing the 'normal route'.
Anyway, it looks awesome yes!!