Super great first game!
I think the ONLY thing its missing is some epic chase music. I think any sort of intense chase song would've really sold the whole experience!
My only complaint gameplay wise is the over-reliance on boost pads; it feels like the only time I can go fast and have fun is when I hit a boost pad. But since boost pads are a high skill option, its kind of rare that I actually land them! (and they're relatively uncommon)
this is a cute and very nicely polished game, keep up the awesome work :)