Trash Killer 2

Gameplay and rules are the same: you control a space garbageship patrolling the Galaxy. Your aim is to shoot all the asteroids located in your sector. When you shoot bigger asteroids, they break down into smaller parts, which are then broken into most tiny ones. After all the asteroids in the given sector are shot down, your garbageship warps to the next sector.

Energy power-up increases the ship energy level letting you recover from damage.
Weapon power-up upgrades you cannon giving it the ability to do double-shots and triple-shots.
Supercharge power-up lets you fire your weapon for some time without weapon charge decreased.