The level designer really loves wall jumping. Shame the wall jump isn't as responsive as it could be. Maybe I was missing something, but there was a part where after you lose the double jump, you have to wall jump and shoot to hit a switch orb. I tried to do it for so long, and when I finally did, the barrier flung the character out of the level, crashing the game with a fatal error.
Neat idea. Good art. Would be much easier to play with a controller. Level designs' dependence on wall jumping may be a bit of a showstopper for most players. Though I did find you could Mega Man X style climb some walls... but only if they're thick enough and you're facing left.