Issues with creating score count

void Update()
{
if(invulPeriod>0)
{
invulPeriod-=Time.deltaTime;
if(invulPeriod<=0)
{
gameObject.layer=correctLayer;
if (spriteRenderer!=null)
{
spriteRenderer.enabled=true;
}
}
else
{
if(spriteRenderer!=null)
{
spriteRenderer.enabled=!spriteRenderer.enabled;
}
}
}

if(health<=0)
{
Die();
}
}
private void Die()
{
if(gameObject.layer==9)
{
Debug.Log("Killed enemy");
killCount++; //this part doesnt work
Debug.Log(killCount);
}
Destroy(gameObject);
}

private void OnBecameInvisible()
{
if(health<=0)
{
Destroy(gameObject);
}
}

void OnGUI()
{
GUI.Label(new Rect(100,100,100,50),"Score: "+killCount);
}
}
I am trying to make a score count for my game. However, the kill count does not increment, it stays at one.
Layer 9 is the enemy layer. "Killed enemy" is outputted to the log every time one dies. Also, the GUI label stays at 0 for some reason. Any suggestions? Sorry if this is basic, I'm new to unity/c#.

 

Where is the variable "killCount" defined? To me it appears like this script is a script that is attached to every "enemy" GameObject in the scene. Is that correct? If so there's a few problems:

• You have an independent "killCount" variable for each enemy object, rather than a single global counter. Therefore killCount will never go above 0 or 1 because you are destroying the enemy object when it dies, and each enemy only keeps track of its own death, not the deaths of the other enemies.
• Your OnGUI code will draw a GUI Label on the same spot of the screen, for every enemy in the scene. All of these labels will cover each other on the screen.

Try creating something like a "ScoreBoard" object, of which you only have one in the scene, and use that as a central place to count enemy deaths (and any other "score" you want to keep track of).

 

Thanks a lot that was a good tip! I ended up using this video to get it working.