The music is really basic and so is the game. And what's the point on making the game screen so big if you are just going to make it required to use fullscreen?

It's well made and works, but it's not a pure skill game: The only way to manage level 2 is to play many times and go by trial and error. After 3x, I still can't figure out where the 8th platform is, so I gave up.
Perspective is a tricky thing: The shadows sure help but it's not enough. Maybe a way to change the point of view, or add a semi transparent grid would help?

The start jingle is annoying.
On level 2 most of the coins are hard to pick up. (like little invisible walls guarding coins)
The ball controls need to be easier.
No control over camera angle.

Test your games rigorously before you put them up.