Idk what everyone is cryingabout difficulty for. Great game. Easy games aren't fun. I get all the achievements in 20 minutes and never play again. this one is gona have me playing for quite some time. Thanks for the awesome addition. Was kinda easy to obtain all the upgrades though. As far as upgrading the wormhole gun... NO WAY. The point of using it is to save a secies. thats not supposed to be easy.