Took a while to figure out how to jump to the left and to the right, but it was an interesting concept. I thought the ghost boss might need some balancing- it's a lot more mobile than the player, and it takes a long time for the minions to disappear, so it really just boils down to aiming at the boss and kiting the minions, while silently hoping that the boss doesn't spawn in front of where you're kiting. I would suggest either decreasing minion lifespan or making them shootable. Cool game, but my hand hurts from all the kiting.