Fillit for the BlackBerry PlayBook may not be a revolutionary game as the concept has been around for some years on iOS but it is great fun. The game is free to download from BlackBerry App World and quite simply you need to fill up over 50% of the screen with your funky blue 'sphere' things without getting caught by the bad red ones.
And that's it. Simple, pretty and it sure is enjoyable. Maybe one of those games perfect for the commute to work or if you just have a few minutes to spare. Once the game is over you have the chance to upload your score, and in my case see how bad I was at it.
I would highly recommend giving Fillit a try. I think you may be surprised at how addictive it can be.
More information/Download Fillit for the BlackBerry PlayBook