An interesting platformer. There was a lot of jumping anyways!
For some reason there were times when the character was simply unable to jump or lost jumping rights, and ways to use the walls so that it would double-triple jump off the screen. That was entertaining in it's own right, though probably not the intention. :P
I enjoyed seeing the transition of landscapes and an opportunity to explore more of these settings to create a subtle narrative (unless there was one, since the furthest I got was to the tree of doom). The music was pretty random, although ska music is kind of fitting.
Overall the gameplay was good fun, where jumping felt great.