Space to select. WASD or Arrow keys to move. 3 Endings. Cheats in the notes and credits section. Don't read if ya don't want to cheat. (3 endings explanation)
. .project for my current gf . . . . . . . . . . . . . . So you're here to cheat are ya. To get Ending 1, just frickin kill em. to get Ending 2, just frickin mercy em. BUT! Ending 3 happens if you kill them, restart the game, and THEN spare them. So, ideally, for both endings in their organic form, first mercy, then kill, then mercy again. That's how you get all 3 endings without having to mess with the game code and erase data and whatnot. There is a 2% chance that upon playing the game, "My Superhero Movie" from the Teen Titan's Go! Movie will play in the Undertale soundfont. If you want the music anyway, just press 1.