Ufo Invaders

Are you ready to defend the world against the aliens in this game that has a old graphic style?
You salt on your spaceship and you must destroy every alien in front of you. The game will be faster when you will pass the levels

Then I will add new spaceships, I'm only one developer and I don't have a lot of time, if you want send me you personal spaceships I will happy to add them in my game. The picture has to be 30x30 pixel