I like the graphics and the mood in general. The concept is also quite great!
If you aimed for "making a hard game that would take a long time to finish" you also got a point there... I know the jam kinda asked for that, but I'm not sure if that was your goal.
And on the other hand that is not very rewarding for the player. Idk how long I played it yet. 30 min? It's late, I'm sleepy... gotta be honest there, still: imo the physics could and should be more user friendly and forgiving.
For example three ideas...The player could "stick to the ground" when he touches it, so you don't tumble of platforms which you actually hit. Especially because you rarely have a change to use less power, and can hardly be blamed for tumbling off.
On the other hand the power is often not strong enough to do trickshots with oposing walls or such, hitting a wall slows you down quite a lot and sometimes results in strange angles.
And last but not least the path is basically planned and even if you try to follow it you ll often end in positions were every shot is hopeless... probably on purpose, a random level would be cool 2 ofc. Anyway...if you allow the player to reposition with the arrow keys that would also help him to recover from a bad shot. Ofc if trickshots were easier he could also get out of bad positions that way.