Double-click flag so that the music syncs! Press F to attack Sans! (Wouldn't recommend doing it. You might have a bad time.) You can replace characters by going into their costumes and replacing the poses with your characters' poses. You can also change some of the animation code if you want it to look different. Alright nevermind I lied it's fixed now.
fyi I just put a bunch of costumes in one project this took no effort
