Fun game: Rom Check Fail, Windows and i386 GNU/Linux. From the site:

Recipe for ROM CHECK FAIL

Carefully place a dozen arcade classics in a large mixing bowl. Add a dash of awesomesauce, cover the bowl, and allow the ingredients to ferment over three weeks. Uncover in a well ventilated area, then mash until loud and glitchy. Serve over the internet.

Simple “get all the enemies” arcade-style game with a twist: the player’s type, the type of the enemies, the music and the background are randomly selected from a variety of the best classic video games (Super Mario Bros., Pacman, Zelda, Breakout!, Asteroids, Spy Hunter, Space Invaders, Tetris, Marble Madness…), and randomly switch to something new every few seconds. Simple, fun, addictive, and a little bit buggy.