Space defense

Defend your space ship from waves of enemies.Unpaid version contains:- 10 levels- 3 types of guns - upgradable (fire rate, damage, recharge time)You can get full version via the application billing. Full version contains:- 30 levels- 8 types of guns- 7 types of enemies - upgradable (fire rate, damage, recharge time)In this game your main task is to protect your space ship from enemy attacks. For this purpose you own a single laser gun. Each level you earn a money. For money you can improve you gun or make a stronger ship shield. After beating 30 levels you will win and can fly safely back to home.