I agree with AlienKittyInc and zappoy. Very good game. This is absolutely AMAZING for a shootorial... I think it's badge-worthy - maybe Kongregate add some badges for achieving challenges in game?
I don't understand why this game is rank so high. This is nothing more than change graphics from shootorial. My game - superman - is much better than this sheet.
 "Starland Multiplayer TD"){kind=icon}
 "River Raid"){kind=icon}
 "G-Virus: Episode I"){kind=icon}
 "Superman"){kind=icon}