5 colours drag red thingy to draw Don't drag to quickly or else there will be GAPS! also you need to tap/click erase like 3 times if you wanna erase or just click/tap green flag also follow @SigmaCorp
U3.4 JUN 12 ADDED ERASING (just sets pen to black : skull :) U3.5 Is gonna be a minor rework upate and will be released on sept 14