Ball getting stuck on going sideways.

This works perfect, thank you.

I got one question still, what's wrong with this script:

     void OnCollisionEnter ( Collision col ) {
         hitPoints--;
         if ( hitPoints <= 0 ) {
             Die();
         }
         if (col.gameObject.tag == "Ball")
             Debug.Log ("Particles!");
         Instantiate(particlesPrefab, transform.position, Quaternion.identity);
         Destroy (gameObject);
     }

As it won't delete those particle systems that it instantiates.

I would have to see more code. Nothing here destroys the particle system, so I'm not sure how you want this to be have. In addition since you do a Destory(gameObject), you are destroying this script, so any later code that would have destroyed the particle system won't be run . Often this kind of problem is handled by doing:

 GameObject go =  Instantiate(particlesPrefab, transform.position, Quaternion.identity) as GameObject;
 Destory(go, 2.5f);

This will destroy the particle system 2.5 seconds after the Destory() call.

Note it is best to ask new, unrelated questions as a new Unity Answers question. It is the way UA is designed, and you will have a much greater chance of getting an answer.

I thought that was going to be a simple problem so didnt make a new question for it but no.. Now it gives me:

"Cannot implicitly convert type 'UnityEngine.Object' to 'UnityEngine.GameObject'. An explicit conversion exists (are you missing a cast?)

"The best overloaded method match for 'UnityEngine.Object.Destroy(UnityEngine.Object, float)' has some invalid arguments"

"Argument '#2' cannot convert 'double' expression to type 'float'"

Here's the full code:

 using UnityEngine;
 using System.Collections;
 
 public class BrickScript : $$anonymous$$onoBehaviour {
     
     static int numBricks = 0;
     public int pointValue = 1;
     public int currentLvl = 0;
     public int hitPoints = 1;
     public int powerUpChance = 3;
     
     public Transform particlesPrefab;
     
     public GameObject[] powerUpPrefabs;
     
     public AudioClip[] hitaudio;
     
     // Use this for initialization
     void Start () {
         numBricks++;
     }
     
     // Update is called once per frame
     void Update () {
     if ( currentLvl == 4) {
             Application.LoadLevel("GameOver");
         }
 
     }
     
     void OnCollisionEnter ( Collision col ) {
         hitPoints--;
         if ( hitPoints <= 0 ) {
             Die();
         }
         if (col.gameObject.tag == "Ball")
             Debug.Log ("Particles!");
        GameObject go = Instantiate(particlesPrefab, transform.position, Quaternion.identity);
         Destroy (go, 2.5);
     }
     
     void Die() {
     Destroy ( gameObject );
         BallScript ball1Script= GameObject.FindGameObjectWithTag ("Ball").GetComponent<BallScript>();
         PaddleScript paddleScript= GameObject.Find ("Paddle").GetComponent<PaddleScript>();
         paddleScript.AddPoint(pointValue * (int)ball1Script.curspeed);
         
         numBricks--;
         
         Debug.Log (numBricks);
         
         if ( Random.Range(0, powerUpChance) == 0 ) {
         Instantiate( powerUpPrefabs[ Random.Range(0, powerUpPrefabs.Length) ] , transform.position, Quaternion.identity );
          }
         
         if ( numBricks <= 0 ) {
             //Load Next Level
         Application.LoadLevel(currentLvl+1);
         if(currentLvl == 1){
         GJAPIHelper.Trophies.ShowTrophyUnlockNotification (4086);
         }
         if(currentLvl == 2){
         GJAPIHelper.Trophies.ShowTrophyUnlockNotification (4087);
         }
         }
     }
 }

Sorry, I forgot a cast. You need "as GameObject" on the end of the Instantiate. I've edited my comment.

Changes you made gives errors:

"The best overloaded mathod match for 'UnityEngine.Object.Destroy(UnityEngine.Object, float)' has some invalid arguments"

"Argument '#2' cannot convert 'double' expression to type 'float'"