Like the puzzle aspect of the characters unique use situations, however I had a really hard time detecting hight and walls that where almost parallel with the viewport. If you angled your directional light a bit more to create clear shadows, this problem would almost be solved. I think you also need to increase your shadow distance a bit, as sometimes the shading seemed to clip out.
All by all a nice game!
edit: I forgot to mention that at first I could not for the life of me figure out where my character was, maybe a highlight or something could fix this.