Venan Entertainment’s vertical climber Ninjatown: Trees of Doom has added a new update that features the “Scribble Skin,” a cool feature that turns your screen into uh, well, a scribbled cartoon. Looks pretty cool as you can see from the above screenshot. Ninjatown: Tress of Doom is available now for the iPhone/iPod Touch on the app store for $1.99. You can also pick this up for your iPad in HD for $2.99. Take a look at the rest of the screenshots after the brea.