Version5

Assets/Scripts/Player.cs

@@ -0,0 +1,36 @@
+using UnityEngine;
+using System.Collections;
+using System.Linq;
+
+public class Player : MonoBehaviour
+{
+    [SerializeField] private Transform _enemiesContainer;
+    [SerializeField] private Transform _finishPanel;
+
+    public int EnemiesOnLevel { get; private set; }
+
+    public int KilledEnemys { get; private set; } = 0;
+
+    private void Start ()
+    {
+        var enemies = _enemiesContainer.GetComponentsInChildren<Square>();
+        EnemiesOnLevel = enemies.Count();
+    }
+
+    private void OnTriggerEnter2D (Collider2D collision)
+    {
+        if (collision.GetComponent<Square>())
+        {
+            EnemiesOnLevel--;
+
+            if (EnemiesOnLevel == 0)
+                OnLevelPassed();
+        }
+    }
+
+    private void OnLevelPassed ()
+    {
+        Time.timeScale = 0;
+        _finishPanel.gameObject.SetActive(true);
+    }
+}

Assets/Scripts/PlayerMover.cs

@@ -0,0 +1,54 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class PlayerMover : MonoBehaviour
+{
+    [SerializeField] private float _speed;
+
+    private float _boosterTime = 0;
+    private float _boosterForce = 0;
+    private float _defaultSpeed;
+
+    private void Start ()
+    {
+        _defaultSpeed = _speed;
+    }
+
+    private void OnTriggerEnter2D (Collider2D collision)
+    {
+        if (collision.TryGetComponent(out SquareBooster squareBooster))
+        {
+            _boosterForce = squareBooster.BoosterForce;
+            _boosterTime = squareBooster.BoosterTime;
+
+            StartCoroutine(Booster());
+        }
+    }
+
+    private IEnumerator Booster ()
+    {
+        var waitForSeconds = new WaitForSeconds(_boosterTime);
+        ChangeSpeed(_speed + _boosterForce);
+
+        for (int i = 0; i < 1; i++)
+        {
+            yield return waitForSeconds;
+        }
+
+        ChangeSpeed(_defaultSpeed);
+        StopCoroutine(Booster());
+    }
+
+    private void ChangeSpeed (float speed)
+    {
+        _speed = speed;
+    }
+
+    private void Update ()
+    {
+        Vector3 moveDirection = new Vector3(Input.GetAxis("Horizontal"), Input.GetAxis("Vertical"), 0);
+
+        transform.Translate(moveDirection * _speed * Time.deltaTime);
+    }
+}

Assets/Scripts/Square.cs

@@ -0,0 +1,35 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class Square : MonoBehaviour
+{
+    [SerializeField] private float _speed = 2;
+    [SerializeField] private float _movementRadius = 4;
+
+    private Vector3 _target;
+
+    private void OnTriggerEnter2D (Collider2D collision)
+    {
+        if (collision.GetComponent<Player>())
+            gameObject.SetActive(false);
+    }
+
+    private void Start ()
+    {
+        CreateNewTarget();
+    }
+
+    private void Update ()
+    {
+        transform.position = Vector3.MoveTowards(transform.position, _target, _speed * Time.deltaTime);
+
+        if (transform.position == _target)
+            CreateNewTarget();
+    }
+
+    protected void CreateNewTarget ()
+    {
+        _target = Random.insideUnitCircle * _movementRadius;
+    }
+}

Assets/Scripts/SquareBooster.cs

@@ -0,0 +1,13 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class SquareBooster : Square
+{
+    [SerializeField] private float _boosterForce;
+    [SerializeField] private float _boosterTime;
+
+    public float BoosterForce => _boosterForce;
+    public float BoosterTime => _boosterTime;
+
+}