Creating the illusion of depth in 2D space

I'll start out with I know Unity has a great 3D engine and I could achieve this in that realm, I'm playing around with that as well. The truth is I like the simplicity of the 2D engine for this application and would prefer to make this work here, if possible and not too much of a headache.

I'm looking to fix the perspective issue shown below. Basically the greater the Y-axis value of an object, the higher in the rendering order of the graphic so things in front will block those behind them and there'll be an illusion of one object passing behind the other. Does anyone know of any Unity trick for this?

 

Hey, it's pretty simple.

Code (CSharp):

1. using UnityEngine;
2.  
3. public class YSort : MonoBehaviour {
4.  
5.     Renderer rend;
6.  
7.     void Start () {
8.         rend = GetComponent<Renderer>();
9.     }
10.  
11.     void Update () {
12.         rend.sortingOrder = -(int)transform.position.y;
13.     }
14. }

 

Thank you thank you! I figured it would be.