• Star Defender

From author's site:

Star Defender is a superb remake of the famous game also known as Galaga, Galaxians or Space Invaders. You are a test pilot flying the Tornado spaceship. Your ship is controlled by your mouse. The ship is limited to movement in the lower line of the play area. Tornado can have up to 5 levels of power-ups.

Each level gives you both more life and a more powerful weapon. Every time you are hit, you will lose 1 power level. When all power levels are depleted, your game is over. To fire, press the left mouse button. If you have rockets - press the right mouse button.