I love the camera zoom out on the boss level, it felt really dramatic ^^ The explosive jump mechanic also gave me tf2 vibes! It'd be really cool to chain jumps, by throwing and detonating an explosive midair.
It took me a while to complete the boss level, and I wish the player had a couple of lives so I didn't have to keep restarting at the original spawn location. But overall, creative mechanic and polished, really impressive stuff!