Boring and repetitive gameplay..
Also, how come you put a song of someone you don't even remember? You HAVE to credit the producer properly
Edit: The challenge here is not to die due to the bug of moving, and when you jump, the character still moves.

A commit on newgrounds i made

The music you putted suited very well on the game, the difficulty is challenging, but the level design is confusing, you should make the level more colorful, also you should put some enemies on the level to make it more challenging, thats the things you need to change, but the rest is fine.