A more advanced app, PaintPot [May 15, 2012, 1:51 p.m.]
How eady was it to have Hello Purr working on your device??? Really easy, right? So let's try something a bit more invovled: PaintPot!
You can follow this step by step tutorial to get PaintPot on your device.
To finish this task why don't you modify the tutorial and show us what you did by describing the changes and taking a screenshot of your blocks? Use the comments for that.
Soem ideas could be changing the background picture with the camera, or adding more colours to the palette.