Arrow keys to move your SOUL, Z to interact, and X to go slower. I was too lazy to add the Karmic Retribution meter. This is less like an actual Undertale boss fight, and more like one of those old arcade games. Sorta. Oh yeah, something special happens when you SPARE Sans. And I don't mean losing.
I don't own Undertale. Check it out here: undertale.com This is NOT the same as the actual Sans boss fight, so if you wanted that, sorry, you should go elsewhere. I'm still working on sound effects, btw.
