I do have to say... the trailer shows all kinds of neat things to do that I'm fully unaware of how to do. Arrows move, Z jumps. C talks. I've only managed to kill one snail with the box and then can't do anything else. I can't jump high enough to continue, and I can't hurt the snails to appease the mushroom. Hmm.
Hah! Nevermind. I didn't realize you could keep walking past that guy. Maybe a sign with an arrow pointing that way in 1.5? Since the level seems to imply going up.