Metroid Life is based off of the old Conway’s Game of Life, only with metroids.

Changes:

pause screen is now an edit screen!
pause game(press start)
a cross hair will appear
press the d-pad to manuver the crosshair
press X to tuggle current metroid on/off
to clear grid press triangle.

http://forums.qj.net/showthread.php?t=134840