This is an implementation of the Unity Space Shooter tutorial. The original tutorial is at
http://unity3d.com/learn/tutorials/projects/space-shooter
You can play the finsihed game on the web at
https://bblodget.github.io/SpaceShooter/
You will need to enable the Unity plugin. The arrow keys move the ship and the left control key fires. You need to click in the plugin window to give it focus for the keystrokes.