Awesome game. No friendly fire makes it a bit easy though, especially on the defence levels. Just put a mortor and stnd next to a barrel. when the barrele explodes, you runs around the map quickly placeing barrels behind you. The effect is you appearing to be a god of hellfire, especially once you get the cluster explode upgrade (start Welcome to Hell on intermediate to see what I mean)
It is possible for you to get all the blue herbs, and thus triple jump, before getting he piece for learning how to dig. With triple jump you can get the piece in the game that is suposed to be for learning how to lighten your body. then, when you need to learn how to lighten your body, you can end up wandering around forever until you walk into the frame that you got the piece from, and the cutscene initiates. Proo apprently finds an empty ledge interesting.
needs higher junp, faster movement, the flinging platforms need to either be less sensitive or have some kind of marker that visually fills up before it launches, and needs things that damadge your health but do not kill you. A tutorial level would be nice in a full version (and obviously more levels). If this is meant to be the first level, it's a bit hard. make it level two or three.