Z to select and X to go back. WARNING: Since this is a demo you will only get to play for 5 minutes only!! when the demo has eneded, you can still fight and the noob still attack but you can not see anything. Who ever has done a no hit quest and complete it congratulations you are a champ.
Thanks to pococikapusta for the original project Undertale Simple Battle Creator v 3.3b.And toby fox that made undertale.
