A great port of the classic game on Gameboy color.
First off you can choose your own ship, each having there strengths and weaknesses. Secondly the developers have added many new and awesome ship upgrades to help you along the way, from the standard laser to the cool electrical gun which can infect other ships, really cool. There are over 100 stages in this game, complete with boss stages. If you can get through that a really cool port of the original game gets unlocked! What value.
It's all in nice color and features a password system to ease the difficulty. If you find this game on Ebay, or at flea market, pick it up, as it would almost certainly be a bargain