I have been unable to progress past the Desert Stage due to an enemy that spawns but cannot be killed. This enemy cannot be interacted with, nor do any of the attacks hurt your character. I have encountered this specific enemy in about 7 separate runs now. No ability/weapon type seems to be able to harm it. When it spawns its an immediate end to a run. If I am just not understanding how to beat this enemy help would be appreciated. However in all testing so far this seems to be a bug.