The Chronavi

The Chronavi is a first person shooter for Game Boy Advance similar to the likes of Wolfenstein 3D or Doom. In order to play the game, you can either use an emulator, or you can play it on real hardware with use of a flash cart like EZ-Flash. Playing on real hardware will produce the best results. 

The Chronavi is the name of the space ship the game begins on. You get attacked by aliens, and you need to fight them through multiple levels and environments. The game has 30 levels to play through. Each level should only take a couple minutes to beat (if you don't die). 

Have fun!