Mostly agree with everyone else. Great idea, but needs many touch ups. Upgrades I don't mind being the way they are, but make it so my main cannon can make up for the lack of being able to keep up. Speed up the bullet speed at least. We're shooting lasers arn't we? Even the enemy can shoot faster to balance it. Mouse should control the screen as well instead of the arrow keys. And give us the ability to look up and down please....