Question] Simple, isometric CoC style city building game, any Unity (or GameMaker?), tutorials?

I want to create a lightweight Unity game that would be isometric city building with zoom like Clash of Clans. No online, just single player, very simple, only city building, nothing else. Choose a building and place it on the map. That's it.


Are there any simple tutorials for this?

Most important notes:
- Has to be optimised (minimum lag)
- Has to have option to export to Android, MacOS, Windows, iOS.
- Simple, simple, simple (single player, isometric map, zoom in, zoom out, choose a building and place it or rearrange them)


And is Unity 2D best fit for this or game maker?

Any advice would be much appreciated.

PS: Sorry if posting in wrong section, not sure which section describes this subject best.