A Shader Noob and Overlay

Okay, so basically I have a simple sprite that I want to be rendered on top everything (short the UI elements). I copied the default sprite shader, and I changed the Queue tag to Overlay, which according to my research should do what I wanted it too. Created a custom mat, applied the shader, aaaand it's behaving like a normal sprite again.

What did I do wrong?

 

"Queue"- is about when but not about how. Try "ZTest Always".

 

Thanks! That solved it.