I give the game 3/5. It has some very nice potential. I know that your ship upgrade gives you more speed, but I think things should move faster. The waves should either be longer or based on number of ships attacking. It would be nice if fire button had a power-up mode where it fires slower but more powerful as you hold it down. If the ship movement and firing was all done with the mouse, then I would have enjoyed it even more. GOOD JOB!!!