Double-click flag so that the music syncs! 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.
@SquigglyTuff for the engine (and the BF Cat Sprite, I think) Balloon for the Funkin' Physics Mod Idk made the song Valve for Gmod and gm_construct. I made the Trollface cat sprite, from scratch! (*insert rimshot*)