Congrats on submission and making all your assets. Doing the programming and assets together for the jam can be quite the daunting the task. Player controller was solid and moving around felt good, which is huge for a platformer. Checkpoints for level 2 would be a plus and constraining the player movement in x while climbing ladder would be good. I feel if you focus on the level design, add some music and sound, you'll be making some pretty fun platformers.