Just press space or arrow keys.
finding Magnus Chase art was a lot more difficult then finding PJO art, so there isn't as much here as my PJO project. I got this all off of google. if you want to see my PJO project go here https://scratch.mit.edu/projects/880254337/ if you want to see my KOTLC project go here https://scratch.mit.edu/projects/891490582/
