It was well designed and all of the jumps and platforming was obviously well researched. It really feels like you put time and effort into planning the game design. It looks appealing, has jammin music and controls really well. It's also extremely intuitive, without having to use tutorials unless it was a new game mechanic that the levels revolved around.
-.5 because it should have been longer with more variety and more levels.
Overall awesome game that I, and I'm sure many other people want to see more of.