I would like to bring to your attention a demo I have compiled for the GBA.
Hazard Ball is a fully developed game looking for a publisher, featuring over 100 levels which test your mind, skill and patience. The game is jam-packed with powerups, hazards, interactive objects and death traps. Also if you are lucky enough to own a Kionix Accelerometer (created by Keith Epstein (gbadev member)) then you can experience a whole new game mode designed specifically for the tri-axis motion sensor!