This was the winning entry in a contest to create an Undertale fight with the worst possible control scheme.
It’s a battle using the Create Your Frisk engine. Use your mouse to control the position of the heart. Then control the velocity. Then the acceleration. Then the the jerk. Then the jounce. Yes, those are real terms.
To play first download Create Your Frisk and extract the ZIP file where ever you want. Then download the fight itself here and copy the A Very Derivative Undertale Fan Game directory into the Mods folder. Start Create Your Frisk and select A Very Derivative Undertale Fan Game from the mods list.