up arrow - pen up down arrow - pen down left arrow - changes the pen's color by -10 right arrow - changes the pen's color by 10 a - changes pen's saturation by 10 b - changes pen's saturation by -10 c - changes pen's brightness by 10 d - changes the pen's brightness by -10 e - changes the pen's transparency by 10 f - changes the pen's transparency by -10 g - changes the pen's size by 5 h - changes the pen's size by -5 r - resets everything to it's original state, but does not erase the drawing. The green flag erases everything.
I don't know, maybe you can challenge your friends to a draw-off?
