Good game, but could be better
I don't know if it was just my computer, but the game seemed slow. I'm in two minds about the weapon control: I like not having to keep pressing/holding a key to keep shooting, but at the same time I like to be able to control when to shoot. A few things I thought you could do to improve it:
-Make it faster (unless it is just my computer that made it slow)
-Make it the player's choice whether or not to control the shooting
-Introduce more different types of power-ups (e.g. different types of weapons or a shield)
-Enable the player to change his mind about whether he controls the ship with the mouse or keyboard - once you start the game, if you don't like the controls, you can't change them
Ok, I think that was it.