Love the thud, particles and camera shake when you land on the ground! I like that the red shadow skips directly to the end, nice spin on a classic concept. With some clearer level design this could be even better.
The music is clearly composed to loop, but there is a tiny bit of silence between loops. If you use mp3 files there will be a tiny bit of silence at the very start, which can lead to these small skips. ogg's are great for looping, and very space efficient.