Shooting Game in Space

Earth is going to be invaded by evil alien spaceship, star-ship and unidentified flying object from outer space. Fortunately, you are the best pilot in the galaxy. Your mission is very simple which is to protect our planet (Earth) by destroying all of the asteroids and alien spaceships. Stay alive by avoiding shots and collision from the alien spaceship(s) or spacecraft(s). In order to get to the next level, you must destroy at least 95% of the asteroids and alien spaceships. In each level, if all of the asteroids and alien spaceships is destroyed, a bonus space ship or spacecraft is added. In level 17 and up, your space ship has extra firing power. It shoots three weapons simultaneously.

Android TV remote/D-pad/Game-pad Controller Instruction:
Use the arrow keys to move the spacecraft to the left, right, up and down.
The spacecraft fires the weapon when the center or 'A' button is pressed.

Android Phone/Tablet/Touch screen:
Slide right/left/up/down: The spacecraft moves to the right/left/front/bottom.
Touch or tap on the screen: The spacecraft fires the weapon.

Keyboard Instruction:
Use the arrow keys to move the spacecraft to the left, right, up and down.
The spacecraft fires the weapon when the left 'Ctrl' button is pressed.