Well, saying Rator-like game, we have OpenTyrian for GP2x, so you can expect it will be on Wiz too someday.
http://dl.openhandhelds.org/cgi-bin/gp2x.cgi?0,0,0,0,30,2433
Actually I prefer it to Raptor, I don't like PC-based shoot'em-ups very much, though
(Why don't you try DoDonpachi or...