Orbitron - action game

Orbitron is a free online flash game of the category action games.

Defend your Orbit by building up an impenetrable stronghold and hold back the enemy waves!
Inspired by Space Invaders and Tetris, Orbitron is a mix between a shooter and a defense game. Prove your shooting and defense building skills in 34 challenging levels!
Tips:
Focus on staying alive rather than chasing down every enemy; Your Orbit has 40 lives and can be easily repaired, while you only got 3.
Only killing will earn you money; so don’t just build walls and let the enemies collide, you will soon run out of money.
Build strategically; build non-permeable walls under your turrets, if you’re afraid of shooting them. Also, an Amplifier above a Turret is also a good idea.
[Update 23.10.07] - fixed the bug at the end of game
[Update 24.10.07] - improved performance

Move: Move Mouse;
Shoot: Left Mouse;
EMP: SPACE;
Pause: P;
Mute: M;
Rotate building: SPACE;
Play the tutorial for more information!

A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.