Radzh released a demo of his puzzle game Cosmo2x.

Release notes:

Space adventure puzzle for the brilliant GP2X handheld. Well, it’s techno-demo actually. Survival mode only, no weapons, two different kinds of monsters, one kind of mines only. Unlimited undo, stylus or joystick input. Kill ’em all before ’em kill you. Save the Earth kinda.

http://archive.gp2x.de/cgi-bin/cfiles.cgi?0,0,0,0,25,2701