Liked the idea, really good job on the sound effects. :)
Having to wait at the checkpoint was really confusing at first, I tried jumping of the large gap and only found out what to do after waiting around and reading the instructions again to see if I overlooked something.
The wall jumping feels a little bit clunky to me, would be nice to have a bigger upwards move and more air control after a wall jump so I can stick back to the wall faster.