Into the java script editor, you just changed the screen size. You can input ANY SIZE! Why does nobody use this! I can make a game in 4k! (with low FPS but thats besides the point) There has been MANY times where I wished this was possible and now I find it IS?!??!?!
Anyways I just wanted to share this so no one suffers as I did.
I personally don’t use it very often because it feels like cheating. It takes away one of the limitations that makes makecode arcade what it is. It also isn’t hardware compatible, or multiplayer compatible