Space Base Defence: The Invasion

Game has 6 different maps: Moon, Mars, Jupiter, Pluto, Mercury, Venus.

4 types of user control weapons: Ion Cannon, EMI, Extra EMI, Base Shield.

You have to complete first level to unlock second etc.

By killing robo-bugs you earn money and expirience points. After each level you can unlock and upgrade your special weapons. Sometimes you need to play level twice to collect enough exp point for more powerfull weapon.

3 music thems.

Auto save progress. (unlocked levels, gold, exp, weapon upgrades) Just press continue button.