Here's a video where a hamster runs through what looks like a cardboard cutout of a side scroller video game. It seems like for most of the video the 'level' is up and down but for some of it they turn the 'level' on it's side to make the hamster go where they want it to. In any event the effect is of a hamster running around in a side scroller video game collecting food treats. They add monsters and moving platforms by using wires with paper cutouts glued to them. At a couple points in the video the hamster things about climbing out of the 'level' completely.

Check out the video of the hamster playing the video game below or click over and view it on the host site.

Source: BoingBoin