Marmalade has made a name for itself on the PlayBook with their Marmalade SDK and the games that have been built on it. They also have some of their own apps on App World including two new titles Fish Fillets and Space Tap. Fish Fillets is one of those puzzle games where you need to slide the obstacles out of the way for the two fish to escape. Its actually a bit of a laugh too since they tend to have some interesting humor. The second game is Space Tap where you are the outer space version of an air traffic controller and you need to guide the ships in and out.
Check out both in App World: