BoxCollider not blocking other object(s)

I’m really newbie , watched about 20 videos about and tried to do something. But I still have problems with collisions.

I’m working on 2D. I have a Sprite and a Cube. When I click to somewhere at screen, sprite is moving to that position. When sprite hit to cube, it should stop moving (when collision occured) , but instead it’s passing through it.

Sprite has these components:

Cube has this components:

BallControl Script

using UnityEngine;
using System.Collections;

public class BallControl : MonoBehaviour {
	private Transform tf;
	private Rigidbody2D rb;
	Vector3 mousePosition;
	void Start()
		tf = GetComponent<Transform> ();
		rb = GetComponent<Rigidbody2D> ();
	void Update ()

		if (Input.GetMouseButtonDown (0)) {
			mousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
			mousePosition.z = 0f; // Because we are working on 2D

		transform.position = Vector3.MoveTowards(transform.position, mousePosition, 1.5f * Time.deltaTime);

Can you tell me why cube’s Box Collider not blocking sprite? Should i add something like this to my BallControl script?

void OnCollisionEnter(...)
     // Stop moving

You have a 2D Collider on the sprite and a 3D collider on the box. Put them in the same dimension and you are good to go.