What do i equip a level advancement script to?

Questions & Answers
1

i already have the script for when all of my turrets(turret1, turret2, turret3) die i advance to the next level, but what do i attach my script to? (ex. player, turret1, turret2, turret3, all turrets, etc.)

Script:

public var arrIsTurretAlive: boolean[];

public function TurretDestroyed(nTurretID: int)
{
        arrIsTurretAlive[nTurretID] = false;

        var bWasLiveTurretFound: boolean = false;
        for (var nCurrTurret: int = 0 ; nCurrTurret < arrIsTurretAlive.Length ; nCurrTurret++)
    {   
        if (arrIsTurretAlive[nCurrTurret])
        {
            bWasLiveTurretFound = true;
            break;
        }
    }

    if(!bWasLiveTurretFound)
        Application.LoadLevel(Application.loadedLevel + 1);
}
2

Since you have some Public functions going there, why not just create an empty GameObject and attach the script to that. It can then monitor the levels state.

You may have to change the existing turret script to then call your "All the turrets are dead" function, but this is similar to any "Level Manager" kind of set-up.