Check out the code here.

OR

Test it out here.

This game is a first-person turret shooter, loosely inspired by Space Invaders. To play:

• To look around, just look around (pretty straightforward)
• To shoot, press the button on the Cardboard (or tap the screen)

To win:

• Shoot these guys to earn points
• Alternatively, if they get to you before you kill them, you lose a life

• Shooting a heart gives you an extra life

• Shooting a star powerup doubles the size of your bullets, making it easier to fend off aliens

Screenshots: