This game is really cool, but I feel that the controls are clunky. Too many actions rely on a single button when there are plenty of other buttons that can be used to do them.
Wall jumping feels awkward as well, latching on to walls feels stiff. The wall sliding is great though.
You really begin to feel how clunky things are when you get to stage 3 where you end up with a lot of platforming and aerial enemies. Having every action but jumping bound to a single button really handicaps the player when you're sliding around on ice in between enemies, spikes, and pits.
Once again, I think this game is cool, conceptually, graphically, and even the game play mechanics. I just feel that the control is holding it back.