Thanks for the feedback!
I know this game is a maybe to simple, but since I'm still learning I wanted to make a game I could finish without taking to much time.
First, how does the scoring/the number in the top left corner work?
Each time you fire a bullet You loose a point, if you hit one of the shield you regain your point, if you hit the defender you gain 3 points and if you make him lose a life you gain another 3 points. Also, when you lose one of your aliens you loose 3 points.
The first time I played, I killed the ship, but it never used an extra life to respawn. Eventually the aliens reached the earth, it said I lost for some reason?
Hum.. that must be a bug, sorry