1) Click on the colors to change the color of your pen. 2) The eraser can be used to get rid of some parts manually (it's actually only a white pen), but if you want to clear the whole screen, press space. 3) Click to draw
Glitch: the pen will draw even when you adjust pen size, just behind the variable. Sorry! I'll figure out how to fix it soon though. Also, it will sometimes make a dot when you select a color.
