rendered in evee, it was fun to make, learned few things about topology.
animation:
You can move the green square a little bit back and add on top of it a plane with a glass material so it will have some depth (use the solidify modifier to make it a little bit thick )
Also don’t forget imperfections it will add a lot
adding a glass material sounds perfect. About the imperfections, I didn’t know how to do it, this is an old render. I will do it in other renders thanks