Ah, what a cute little game!
It's a quaint little experience with a simplistic yet eye-catching design. Everything in it seems to work together to fit with the style, from the music to the sound effects (I love the funny noise when you jump!)
The bike is very floaty and forgiving with jumps, to the point where I can just ride across the platforms without jumping. I can also fly completely across the map in one jump with a single upgrade, which was kind of fun tbh.
The bike's hitbox is very small, and it can get slightly annoying when trying to get coins and dollars. Other than getting money and upgrades, there isn't much to explore at the moment; I went outside the rocks and found an empty void, so maybe you can expand it there.
Good work!