You can play this version I just uploaded to my dropbox, if you do just play it in a wider resolution. I'm not sure if you need both files, let me know if you have a problem with it. Its best if you just open it with firefox or a web browser and then go fullscreen. If your not fullscreen everytime you right click you get a message saying to go fullscreen and about unity player.
Anyways, controls are
SPACEBAR is Jump
Left Mouse Click is Shoot
Right Mouse Click is Melee
Keep an eye on your AMMO, its limited
You lose 1/4 of your health when you hit an enemy.
Floating Boxes with 3 Red bullets are extra ammo.
Green spheres are shields
Boxes with a yellow flash on them are turret guns.
Theres no melee delay, you can mash it.
http://extraction.site50.net/^Finally, you can download the game here with the .html file and the .unity3d file