not too bad
Visually, it was great, but the arms needed to move while walking.
The controls were not so good. I fell too slow, went through platforms, and bounced around erratically when I jumped near the sides of platforms. Lots of bugs to fix.
Also, it was too easy. The real challenge was dealing with the tempermental controls :D
Needed music, as you said. BUT DONT AD SOUND EFFECTS. Those are more trouble than they're worth, they usually suck.
Good idea though, keep trying!