Mole.cs

Whac a mole

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Mole : MonoBehaviour {

	[SerializeField] private float visibleHeight = 0.1f;
	[SerializeField] private float hiddenHeight = -0.5f;
	[SerializeField] private float speed = 4f;
	[SerializeField] private float disappearDuration = 1.25f;

	private Vector3 targetPosition = Vector3.zero;
	private float disappearTimer = 0f;

	/// <summary>
	/// Awake is called when the script instance is being loaded.
	/// </summary>
	private void Awake()
	{
		targetPosition = new Vector3(transform.localPosition.x, hiddenHeight, transform.localPosition.z);
		transform.localPosition = targetPosition;
	}

	// Update is called once per frame
	private void Update () 
	{
		disappearTimer -= Time.deltaTime;

		if(disappearTimer <= 0)
		{
			Hide();
		}

		transform.localPosition = Vector3.Lerp(transform.localPosition, targetPosition, Time.deltaTime * speed);
	}
	
	public void Rise()
	{
		targetPosition = new Vector3(transform.localPosition.x, visibleHeight, transform.localPosition.z);

		disappearTimer = disappearDuration;
	}

	public void OnHit()
	{
		Hide();
	}

	private void Hide()
	{
		targetPosition = new Vector3(transform.localPosition.x, hiddenHeight, transform.localPosition.z);
	}
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class GameController : MonoBehaviour {

	[SerializeField] private GameObject moleContainer = null;
	[SerializeField] private float spawnDuration = 1.5f;
	[SerializeField] private float spawnDecrement = 0.1f;
	[SerializeField] private float minimumSpawnDuration = 0.5f;
	[SerializeField] private float gameTimer = 15f;

	private Mole[] moles;
	private float spawnTimer = 0f;
	private float resetTimer = 3f;

	// Use this for initialization
	void Start () 
	{
		moles = moleContainer.GetComponentsInChildren<Mole>();	
	}
	
	// Update is called once per frame
	void Update () 
	{
		gameTimer -= Time.deltaTime;

		if(gameTimer > 0f)
		{
			spawnTimer -= Time.deltaTime;
			if(spawnTimer <= 0f)
			{
				moles[Random.Range(0, moles.Length)].Rise();

				spawnDuration -= spawnDecrement;

				if(spawnDuration < minimumSpawnDuration)
				{
					Debug.Log("Speed up");
					spawnDuration = minimumSpawnDuration;
				}

				spawnTimer = spawnDuration;
			}
		}
		else
		{
			resetTimer -= Time.deltaTime;
			if(resetTimer <= 0f)
			{
				Debug.Log("restart");
				SceneManager.LoadScene(SceneManager.GetActiveScene().name);
			}
		}
	}
}