Space changes color, q size +1, a size -1, up arrow pen up, down arrow pen down, and when you hover over the eraser it erases everything.
This was me looking around at pen for the first time. Feel free to use my code for any of your games! Also, If you hold down space it gives off a rainbow affect-sort of like slither.io if anyone remembers that. It seems like I'm always finding new things about my games.
