[V1.3.9] Add yourself/your oc singing The End Remastered (0) remix

Instructions

WARNING: DOUBLE CLICK FLAG FOR TO WORK BLOCK SYSTEM BY @Upauggfg12343nk TYSM New block system by @DeanDaCat yay Double-click flag so that the music syncs! (please) 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. You can also change the note skin of each arrow set now block aaaaaaaaaaaaaaaaaaaa