Imagine a bunch of magnetic blocks that you can stick to your refrigerator. If you put them in the right spots on the fridge door, you can drop a marble from the top of the fridge and have it bounce and fly about until it reaches the target at the bottom. That's the basic idea behind this webtoy that won the Mozilla Labs Game On open Web game development competition. And yes, it's cooperative, because you're building just one part of a gigantic, continuous marble run with thousands of other players, like refrigerators stacked from here to the moon.

If The Incredible Machine met the classic board game Mouse Trap, TubeTwist would be the result. Arrange tubes, accelerators and other contraptions to manipulate the path of the Macroton (a colored marble-like object) from the Injector Tube (the start) to the Reactor Tube (the finish). It's that simple!

Mallet Mania is Nitrome's newest production, a Marble Madness-type puzzle game. By using what appears to be a wireframe croquet mallet, you whack your ball with varying direction and power to guide it through maze-like levels to the goal. Stating the obvious but still worth noting, Nitrome once again stays with its tried-and-true pixel graphics and vibrant color scheme.