I am okay with platformer controls which seem a bit out of control. Every developer has their own thoughts about what feels right and what not. The parcours starts a bit too high on the difficulty curve. Maybe prepend some training area, with jumps which aren't lethal, so players can get acquainted with the controls first.
I would also experiment more with the texture for the floor. It should be a lot darker. Now there is too much contrast with the white in it.