I write fun shoot-em-up games for Windows, Mac OS X and Linux.
Linux demo of Scoregasm. You'll need a reasonably modern distro to play, and hardware accelerated graphics drivers set up correctly. Have fun!
Mac OS X demo of Scoregasm. Unzip te file (if your browser hasn't done it for you) and run the Scoregasm app to play!
Windows Demo of Scoregasm. Just unzip the file and run the exe to play. Have fun!