The music is great and provides great ambience.
As some stated before me, the controls are a real problem since they are not responding well, which is essential in a platformer. You can only jump while walking, i.e. pressing left or right slightly before the jump button. It took me ages to get onto the first moving platform because it seems to have a much larger hitbox than the actual platform.
I'm sure you can find better places or ways to promote the nice music ;)