The mouse is really cute! The controls a bit difficult to get a feel for the jumping, as a tip, place a shadow directly under the character so the player will know where they are going to land. This is pretty impressive for your first game jam! I agree with Moondream Games, some audio would help. It would also be nice for there to be a win condition when you get to the top, but the pile of cheese was nice. Keep at it and I would love to see what you could come up with without the time constraints of the jam!