WARNING may be scary for some users. Use the arrow keys to move the soul. Use Z to press Buttons HINT: press 1 or 2 to head right into the attacks. I plan to make a part 2 of this game and if there's bugs its because this is my first undertale battle.
Thanks to Toby Fox for undertale Gaster animation by @undertalefnaf3 Thanks to @-sclare- for the hp engine Thanks to @xXCrystalSnowXx for Text engines Thanks to@DaBestMarioPlayer for gaster blaster and bone engine. Everything else is made by Me (hardestGasterBlaster)