Yeah, I can't get enough of this. Also, having a touchscreen laptop makes it extra fun.

That said, I'm a bit disappointed that it has a lot of trouble recognizing anything outside of "how people normally draw things" (especially if you go out of your way to do more than "the bare minimum", draw things at a different angle, in 3D, etc).

[1] Umbrella (wheel, binoculars, pizza): http://i.imgur.com/jr9mexS.png

[2] Fork (sword, paintbrush, baseball bat): http://i.imgur.com/3uLIPkH.png

[3] Envelope (phone, eraser, leaf): http://i.imgur.com/pemgKpD.png

I like how all the whales have a smile.