Hey! I also made a 2d Platformer for the jam, and i have something to say about your so u can improve! First, check this vid: https://www.youtube.com/watch?v=vFsJIrm2btU&t=104s. Its and overall tips and tricks to improve the controls and the feel of the game. Second, the camera is too close, it stress me out that i cant see what is next in the level, and in a platformer its really Important!.
Pls also rate my game! Your game is a cool first one! We all had one, so dont worry, just keep participating in jams! c: