Thanks for the feedback. By multiplayer did you mean online multiplayer? Because there is split screen multiplayer.
Anyway, I think you're right that a single track is a weakness of the game. I thought that a future for this game might be in procedurally generated tracks that players race over the course of three laps or so, since the game isn't fun if both players have completely memorized the map. Regardless, I hope the concept was interesting enough to be worth the try.
Thanks for playing!