Simple puzzlegame (no, it's not tetris) where you try to get "blockgroups". Blockgroups must contain four blocks (at minimum) and they all must share the same color.
Download (and doubleclick colors.py): http://up.servut.us/dl/8830
If not working, install python+pygame:
If you are having performance issues, blame Python and SDL for not having proper hardware acceleration, and create a file named 'conf.ini':
sudo apt-get install python python-pygame