Use arrow keys to move the heart, dodge everything! The HP Bar is a bit messed up, but you will die upon the 9th time you are hit by Papyrus's bones! Basically, you will go through the yellow HP Bar in the game 3 times. This is like MajesticPie's "Undertale Boss Fight" game, but Papyrus-themed with more attacks that are more difficult to dodge, thus why you have more HP.
What you can accomplish by fooling around with Scratch codes for 90 minutes. HUGE HUGE Credit to: MajesticPie for creating the codes and scripts used here Toby Fox for creating Undertale and its characters and music (Including Papyrus and the music used here) 2/8/16 UPDATE: You will now die after getting hit 9 times instead of 12. Time to increase the power of Papyrus! FUTURE UPDATE GOALS: Add an accurate HP Bar Add more, and some unique attacks Change some of Papyrus's dialogue to make it more Papyrus-like