Jazz Jackrabbit is a fast-paced, colorful side-scrolling shooter from Epic MegaGames in 1994. It was made for MS-DOS and had 9 episodes each with 3 planet themes across 7 levels. Being a floppy disk game I'm sure you can imagine how modest the system requirments are.

While the original game is not open-source, Alister Thomson has made a game engine recreation for Jazz. It already has ports on many similar systems like the PSP, GP2X and GP32, so I assume a Maemo port is realistic. It does require the original or shareware game files. It would be awesome to have this game.

Further reading:
Wikipedia Page: http://en.wikipedia.org/wiki/Jazz_Ja...8video_game%29
OpenJazz site: http://alister.eu/jazz/oj/discuss.php
Official thread: http://www.jazz2online.com/jcf/showthread.php?t=18173