Hey, I very much like the game so far (at least what I've seen of it).
Getting up on cliffs and especially getting up to the lever on the balloon is a real pain for me though. You need to put Curly in exactly the right spot and then need to press the keys in just the right speed. This is very frustrating. I've died a couple of times and nearly gave up altogether due to this problem. You really need to add more tolerances there.