Pretty fun game! I managed to escape the loop! I think you balanced the difficulty of the levels very well. It was a challenge but never felt too hard either.
My one suggestion would be to make it so that enemies don't disappear when you jump on them. That way if you jump on an enemy but then miss the platform, you can try again rather than having to restart from the beginning of the level. It might also be cool to add a few more hazards like spikes, or maybe make some of the enemies shoot projectiles just to add some variety.