The actual level design is solid, and the play with throwing and using the ball while on moving platforms is neat. The major issue however is in the controls. The fact the player prioritises left and right movement, and can only move in 4 directions is a bit jarring and the stopping time for movement feels a bit slippy for a game that sometimes needs some very precise movement to avoid falling off edges.
If the player movement could be tightened up just a little bit, it would help the game feel a lot better. Still for the 48 hours, a solid level design, only a little hampered by the movement.
If you have time, would love to hear what you think of my game; https://itch.io/jam/gmtk-2019/rate/461074