Pixel Dungeon and hence shattered pixel Dungeon are both based on a totally open sourced computer game called Brogue or BrogueCE (Community Edition) nowadays
It’s not on steam, its just free on the web. Anyone who likes pixel dungeon should check it out
Its not like hitting the fleshy mass of your body or even an appendage though, it pretty much pierced the ear instantly then had nothing to transfer it’s energy into