Now create a new script, the reason for this is to create a script that will destroy the asteroid explosions since they are permanent since they cant be destroyed by boundary or trigger, name the script DestroyByTime
Public class DestroyByTime : MonoBehaviour
{
Public float lifetime;
Void Start ()
{
Destory (gameObject, lifetime);
}
}
Back in unity prefabs VFX explosions select the explosion asteroid, add component, scripts and select DestroyByTime  then set the lifetime to 2, do the same for the remaining explosion prefabs this means that the explosions are no longer crowding the scene which will have an impact on performance should things get out of hand, this code helps keep it in order.

Audio is a large part of video games especially when it comes to immersion and can make a game, of course I can’t make the audio from scratch but using unity store assets I picked a few pieces of audio to use in this project. Select the explosion asteroid prefab so that you can see the inspector then drag the audio clip named explosion asteroid into the asteroid prefabs inspector this will create a audio source and reference to the audio source in the prefabs inspector, make sure play on awake is selected/checked so that the clip is played when explosion is played. Now do the same for the player, drag the desired weapon audio clip onto the player game object, and make sure play on awake is not selected then open the player controller script.
[System.Serializable]
Public class Boundary
{
Public float xMin, xMax, zMin, zMax;
}
Public class PlayerController : MonoBehaviour
{
Public float speed;
Public float tilt;
Public Boundary boundary;

Public GameObject shot;
Public Transform shotSpawn;
Public float fireRate;

Private float nextFire;
Void update ()
{
If (Input.GetButton(“Fire1” && Time.time > nextFire)
{
nextFire = Time.time + fireRate;
Instantiate(shot, shotSpawn.position, shotSpawn.rotation);
GetComponent<AudioSource>().Play ();
}
}
Void FixedUpdate ()
{
Float moveHorizontal = Input.getAxis (“Horizontal”;
Float moveVertical = Input.getAxis (“Vertical”;
Vector3 movement = new Vector3 (moveHorizon, 0.0f, moveVertical);
GetComponent<rigidbody>().velocity = movement * speed;
GetComponent<rigidbody>().position = new Vector3
(
Mathf.Clamp (GetComponent<rigidbody>().position.x, boundary.xMin, boundary.xMax), 0.0f,
Mathf.Clamp (GetComponent<rigidbody>().position.z, boundary.zMin, boundary.zMax)
);
GetComponent<rigidbody>().rotation = Quaternion.Euler (0.0f, 0.0f, GetComponent<rigidbody>().velocity.x * -tilt);
}
}
Now for the games background music for this drag whatever music onto the game controller object making sure it is set to play on awake so it plays immediately and that Loop is also selected so that it repeats when the track would normally end.

Now for some GUI text for a score system and so on. Create a new empty game object add a gui text component from the add component button then in the transform position set it to 0.0, 1, 0.0 then next to where it says Text enter Score Text. Then using the pixel offset which basically says how much space do you want around the text, set X to 10 and Y to -10. Now in the GameController script.
Public class GameController : MonoBehaviour
{
Public GameObject hazard;
Public Vector3 spawnValues;
Public inthazardCount;
Public float spawnWait;
Public float startWait;
Public float waveWait;

Public guiText scoreText;
Private int score;

Void start ()
{
Score = 0;
UpdateScore ();
StartCoroutine (SpawnWaves ());
}
IEnumerator SpawnWaves ()
{
Yield return new WaitForSeconds (startWait);
while (true)
{
For (int I = 0; i < hazardCount; i++)
{
Vector3 spawnPosition = new vector3 (Random.Range (-spawnValues.x, spawnValues.x), spawnValues.y, spawnValues.z);
Quaternion spawnRotation = Quaternion.identity;
Instantiate (hazard, spawnPosition. spawnRotation);
Yield return new WaitForSeconds (spawnWait);
}
Yield return new WaitForSeconds (waveWait);
}
}
Public void AddScore (int newScoreValue)
{
Score += newScoreValue;
UpdateScore ();
}
Void UpdateScore ()
{
scoreText.text = “score: “ + score;
}
}

Now to assign a score value to the asteroids, open up the DestroyByContact script
Public class DestroyByContact : MonoBehaviour
{
Public GameObject explosion;
Public GameObject playerExplosion;
Public int scoreValue;
Private GameController gameController;
Void Start ()
{
gameObject gameControllerObject = GameObject.FindWithTag (“GameController”);
if (gameControllerObject != null)
{
gameController = gameControllerObject.GetComponent<GameController>();
}
If (gameController == null)
}
Void onTriggerEnter(Collider other) {
If (other.tag == ”Boundary”)
{
Return;
}
Instantiate(explosion, transform.position, transform.rotation);
If (other.tag == “Player”){
Instantiate(playerExplosion, other.transform.position, other.transform.rotation);
}
gameController.AddScore (scoreValue);
Destroy(other.gameObject);
Destory(gameObject);
}
}
Now select the game controller in the hierarchy then drag the score text object into the Score Text slot in the inspector and now when each asteroid is destroyed the player gains 10 points. Next is to create an empty parent to hold the text labels such as the score and the two new game objects name one of the new objects Display text and reset its transform, then add score text to Display text so that score text is a child of display text, add another game object and name it Restart text and set its  transform like so 1, 1, 0 and change the Anchor properties from upper left to upper right and the alignment to right and now we change the pixel offset by using -10 and -10, drag the restart text object into the display text to make it a child of display text. Then create new object and name it GameOvertext, making sure the Text is set to Game Over Text and that the anchor is set to middle center and the transforms position is set to 0.5, 0.6, 0 and like the others add Game Over Text object to display Text to make it a child of Display Text.
Now I need to change the Game Controller script.
Public class GameController : MonoBehaviour
{
Public GameObject hazard;
Public Vector3 spawnValues;
Public inthazardCount;
Public float spawnWait;
Public float startWait;
Public float waveWait;

Public GUIText scoreText;
Public GUIText restartText;
Public GUIText gameOverText;

Private bool gameOver;
Private bool restart;
Private int score;

Void start ()
{
gameOver = false;
restart = false;
restartText.text = “”;
gameOverText.text =””;
Score = 0;
UpdateScore ();
StartCoroutine (SpawnWaves ());
}
Void Update ()
{
If (restart)
{
If (Input.GetKeyDown (KeyCode.R))
{
Application.LoadLevel (Application.LoadedLevel);
}
}
}
IEnumerator SpawnWaves ()
{
Yield return new WaitForSeconds (startWait);
while (true)
{
For (int I = 0; i < hazardCount; i++)
{
Vector3 spawnPosition = new vector3 (Random.Range (-spawnValues.x, spawnValues.x), spawnValues.y, spawnValues.z);
Quaternion spawnRotation = Quaternion.identity;
Instantiate (hazard, spawnPosition. spawnRotation);
Yield return new WaitForSeconds (spawnWait);
}
Yield return new WaitForSeconds (waveWait);
If (gameOver)
{
restartText.text = “Press ‘R’ for Restart”;
restart = true;
break;
}
}
}
Public void AddScore (int newScoreValue)
{
Score += newScoreValue;
UpdateScore ();
}
Void UpdateScore ()
{
scoreText.text = “score: “ + score;
}
Public void GameOver ()
{
gameOvertext.text = “Game Over!”;
gameOver = true;
}
}
Now with game controller selected drag Restart Text into the Restart Text slot in the game controller inspector and do the same with the game over text, drag it into the game over text slot.
Now I need to edit the Destroy by contact script.
Public class DestroyByContact : MonoBehaviour
{
Public GameObject explosion;
Public GameObject playerExplosion;
Public int scoreValue;
Private GameController gameController;
Void Start ()
{
gameObject gameControllerObject = GameObject.FindWithTag (“GameController”);
if (gameControllerObject != null)
{
gameController = gameControllerObject.GetComponent<GameController>();
}
If (gameController == null)
}
Void onTriggerEnter(Collider other) {
If (other.tag == ”Boundary”)
{
Return;
}
Instantiate(explosion, transform.position, transform.rotation);
If (other.tag == “Player”)
{
Instantiate(playerExplosion, other.transform.position, other.transform.rotation);
gameController.GameOver ();
}
gameController.AddScore (scoreValue);
Destroy(other.gameObject);
Destory(gameObject);
}
}
Now we have a working game about shooting asteroids in SPAAAAAAACE! If I get time ill add specific enemies that attack the player but that will be extremely last minute if I do get the chance.

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Now to create a game controller start by making a new game object and name it Game Controller and set it to origin position and change the tag to Game Controller and add component, new script and name it game controller, now edit the game controller script. Public class GameController : MonoBehaviour { Public GameObject hazard; Public Vector3 spawnValues; Public inthazardCount; Public float spawnWait; Public float startWait; Void start () { StartCoroutine (SpawnWaves ()); } IEnumerator SpawnWaves () { Yield return new WaitForSeconds (startWait); while (true) { For (int I = 0; i < hazardCount; i++) { Vector3 spawnPosition = new vector3 (Random.Range (-spawnValues.x, spawnValues.x), spawnValues.y, spawnValues.z); Quaternion spawnRotation = Quaternion.identity; Instantiate (hazard, spawnPosition. spawnRotation); Yield return new WaitForSeconds (spawnWait); } Yield return new WaitForSeconds (waveWait); } } } Select the Game Contr...
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