Up arrow to go up. Down for down. Let for left and right for right. Also, choose wisely.... some decisions change the entire game. Also, if you find any glitches with the text, please comment the problem and the crew will try their best to fix it. Thanks!
Note: This game is not even close to it's full release. Credit to: FragileOlive for the PPAP and Baby-Temmie for the font. All boss battle themes come from undertale, by Toby Fox.