loved it, needed more levels of course; sure they will come
I updated mine with the first 30 levels of the NES version (adapted to 5 tiles) and built an Amiga tileset for a retro look.
http://dl.openhandhelds.org/cgi-bin/gp2x.cgi?0,0,0,0,25,2815
I'll end up doing more in a while. Playtested...