You can draw by pressing space and using the touchpad(I think that's what its called) and to erase press e but it will erase everything...to change size press s and use touchpad you might need to reset the game since i don't know how to make the size smaller . To change color press c and space and then draw to see what color it is and it might take a few times to change it...
I just thought of it out of nowhere...WARNING:THE SIZE MAY NOT WORK VERY PROPERLY
