Cityscape Tissue Box Cover

Hide those ugly shop bought tissue boxes with this stylish (if not slightly amateurish) Cityscape Tissue Box Holder!

Apologies in advance for any school boy errors with this model. I'm new to 3D design and after playing around with TinkerCAD for a little while I found my frustrations leading me towards Fusion360. This is my first attempt at a design done in Fusion. The middle building is a super simple mock up of the Ghostbusters building in New York!