There are currently two games using the "Stage" library that you can play on PyGamer or PyBadge. There is a simple platformer game called Jumper Wire, and a space shooter called Vacuum Invaders.

The games were originally written for the µGame board, with the screen smaller than the one on PyGamer or PyBadge, so you will see some random garbage drawn at the right hand side of the screen — don't worry about it. When you make your own games, you can use the whole screen.