Cute! I appreciate that you went all-out on visual aspect of the game and really doubled-down on selling the theme of "cute". If you're gonna do it - don't half-ass it, right?
I had some trouble both navigating menues and picking characters. It wasn't really clear to me when, and what, input was expected from me to proceed, especially in the "character select"-screen. In races I really didn't fare any better, It was hard for me to keep track on what character was mine to control when playing with several bots, and when I failed I had no choice but to sit through an entire race just watching the bots play. Do you think that maybe this game could benefit from having knocked-out players respawn back in, but with some kind of disadvantage?
I think that this idea of a competetive flappy-birds like game has potential. The visuals are already there, and I appreciate the fact that you've already designed different themed stages. If you could pour the same kind of eye for detail into your gameplay and maneuverability in menus then this could definitively turn into a great party game.
Great work, keep it up!