The game does feature some power-ups. There are many smaller enemies on the maps that release orbs when they are destroyed. Collecting these orbs causes your weapons to increase in firepower. These orbs are essential as clearing the stages in the time limit mandates upgrading your weapons.
There are several types of vehicles in this game, and each one flies differently and features a different weapon. While it is fun to see what all of the vehicles upgraded weapons look like, due to the unenthusiastic gameplay, bad AI, and the game's overly serious attitude, the charm quickly fades. There are some multiplayer game options on Xbox Live, but finding other players is a tall order.
This game might appeal to some, but definitely download the trial game before spending the fifteen dollars for the full download.
0 Day Attack on Earth is rated E10+ (Everyone 10 and older) by the ESRB for Fantasy Violence.