Use arrow keys for Player One and WASD for Player Two. Use Z to select things, arrow keys to deselect, same stuff as the original game. It's just a preview as of now, but more is to come! :)
SPOILER ALERT TO UT'S PACIFIST ENDING! It's been a year or so since the pacifist ending to Undertale. You and Flowey have sat in the abyss, happy to let Frisk live their own life. But one day, you decided to play the hero once again, unaware of the consequences that lie ahead. But no matter what happens, this story will become very, very interesting...