When you are not playing in Full-Screen mode, try using WASD because arrow keys will make the page scroll.
Play in Fullscreen Mode
About the Misspelled game
Misspelled game is about casting spells to find help. For example, if you need an object to help you go higher, click and type Rock or Rocks.
If you want to jump, just type Jump or Jumps. You will get instructions there, read and perform tasks.