Fun game, but the level design needs work. 1, 2 and 3 are fine, but I barely even paid any notice to the tree in 4 and ended up beating it with a single block to reach the first objective, 5 seems to want you to use the fans but requires exploiting unintuitive jank (or you can avoid it by just going to the left), and level 6 is only noteworthy because of that spike you don't see that proceeds to kill you until you realize what's doing that, and then is just annoying after that and the rest of the level is easy.