I love the visuals, but the game is extremely difficult. Mainly due to not having any checkpoints (or at least none that I could reach), failing a single jump became frustrating. If you plan to continue making this game after the jam, adding in checkpoints and also "coyote time" (if the player presses space just before landing, they jump as soon as they land, and if they press space just after leaving a platform, they still jump) would make the game easier to enjoy and very entertaining.
I really do love how it looks (and sounds) though, really good job there! :D