* UPDATE: I beat him. Click the flag multiple times. Yeah, FOR SOME REASON, when you first get on the project page, the animation of Sans attacking is slow, so watch it to the end and click the flag more, and it should work :) This is an animation where I play Undertale and fight Sans (and die). By the way, this is a true story.
All art except Sans by me. Animation by me. Undertale by Toby Fox. #animations
