public bool AddEnemyAt(Block block)
{
//Check if we have reached our limit yet.
if (activeEnemies.Count == enemyLimit)
return false;
//Get a new enemy from either sleeping or new creation.
GameObject enemy = sleepingEnemies.Count > 0 ?
GetSleepingFrom(sleepingEnemies) : FactoryAddon.CreateEnemy();
//Add to active.
activeEnemies.AddLast(enemy);
//Position stuff.
enemy.transform.position = block.GetRandomPosition() + new Vector2(0, 1);
//Addition succes.
return true;
}