This game was a really cute and really good. I wouldn't be surprised if it wins. The amount of polish and art is mind boggling for a three day game jam game. (I also see that the submission was pretty clutch. 40 seconds?! Wow.) I am glad you submitted this game. The difficultly is harder than diamond, but that's what makes it so fun to complete.
The only problems I have are just nitpicks and matters of personal taste. The controls are a bit slippery. The difficulty spikes a bit too quickly. The signs only show information the player has probably already figured out from the level design. You have to backtrack to get to the start of a level. The ending is just a freeze frame. (But it's a very pretty freeze frame.)
Other than that, this game is amazing. I hope this feed back is helpful.