The jump physics were a little rough for me. Once in the air I don't think I can change direction, so that made things feel a bit more scripted. A better explanation would be, I felt like I had to jump from certain points in order to solve various puzzles or land in specific areas. I really love the "jump on the button to reveal the next area", and if you had a little more time to add something, I would've loved for each area to reveal with a fade or a scale.
Wait... you were suppose to hit the switch from bellow? I found that I was able to jump on various objects and jump up to the top.