LEFT/RIGHT to move, UP to jump. You cannot attack, and to climb ladders simply jump onto them. Only Jumble Jungle works. DO NOT GO ANY FURTHER.
This is a very glitchy game from 2013. One thing I do quite like is the way the camera follows him- it moves based on the direction he's facing and sticks very well to the confines of the level. I'm surprised I coded it so long ago!