Marmalade has put out another game for the BlackBerry PlayBook built on their Marmalade SDK. This one is called Zombie Road which is a cheap yet addictive side scrolling game. It has you cleaning your road of zombies while stocking up on money and bullets. Its not the most graphically intensive game or even a complex game but its good cheap addictive side scrolling fun.
You can pick up Zombie Road for $0.99 in App World