This is such a cute game! It's simple but fun and playable, art style is definitely its best feature. It is lacking in sound but not much is needed, just some simple sfx and maybe like one looping track lol. It would make a pretty cool mobile game, especially if you add a multiplayer feature (balloon cats racing!)
Feel free to check my game out, I could use your imput: https://wasabiiii.itch.io/grass-elemental-demo-demo
There are so many mechanics you could add, there's a lot of potential. With the coin gauge maybe throw in some different effects for different collectables, or maybe an upgrade system where you can buy power-ups!