Click to place a block of color, space to change color (erase is a color), down arrow or scroll down to save (DOWNload) (S to turbo save), up arrow or scroll up to load (UPload) (L to turbo load). MAJOR UPDATE ON 20161005: TURBO LOADING FINALLY IMPLEMENTED S to turbo save, L to turbo load.
Made in a week. Saving and loading was hardest. 9 colors available: red, orange, yellow, green, blue, purple, black, white and eraser. UPDATE: Unless you want the eraser to erase everything it touches without being clicked, do not use a mousepad with this! UPDATE on 20161005: Now using pen "stamp" function instead of clones to fix lag.