I used this tutorial as a reference. http://www.youtube.com/watch?v=3L8eaoyZ0Go My problem is that whenever I play the game, EVERYTHING works but the bullets. It just falls down instead of flying forward.

This is the flash version of the game: http://v1k.me/swf/

Can some one help me out? Should I upload the project?

This is my "Shoot.js":

public var bulletPrefab : Transform;
public var bulletSpeed : float = 20;

function Update() { 
    if(Input.GetMouseButton(0)) {
        if(bulletPrefab || bulletSpeed) {   
            var bulletCreate = Instantiate(bulletPrefab, GameObject.Find("SpawnPoint").transform.position, Quaternion.identity);    
            bulletCreate.rigidbody.AddForce(transform.forward * bulletSpeed);   
        }   
    }
}