This was the most fun game I've played LD26 yet. It was a pretty simple mechanic, but the design was excellent - jumping felt fun, bouncing on the things felt fun, etc.
Better yet, I really think this has the potential to become a pretty decent little puzzle platformer. As of now, it is quite linear - yeah you have 'paths' to take, but in the end you have to get this ghost, then this one, and eventually this one, etc. By adding a mechanic where you can remove color from him, to perhaps remove walls or something to get by, it could turn into more of a puzzle game where you have to figure out what order to get the things in and which ones to remove and how to get them back up again, etc
Very fun!