not impressed, the game is poorly designed, and has such a stiff upgrade path that you can't really get anywhere with it unless done in a -very- specific path.
seems this game has issues... tried Opera, FF, and Chrome browsers, all had the same problem of the game locking up when the metal doors close after the first level. guess it's not something the dev is going to fix...
 "Xeno Defense"){kind=icon}
 "Infectonator : World Dominator"){kind=icon}