General mobile game developing questions

Hi!

I've recently started learning to work with Unity in college and now want to further explore the mobile game developing scene, but I have some questions that I hope can give me a little clarity.

When making games like Stack, for example.

1. I assume this is a 3D game and not a 2D game with a somehow added perspective?

2. Is everything created procedurally or do you create a main object and duplicate, transform, ... it?

3. What's the normal amount of scenes something like that would have? 1 for menu and 1 for the game? Or how exactly should I best keep them organized?

General questions

1. Are there certain assets or plugins that would greatly help me? It can cost a little but I'm not exactly planning on investing a lot before I know this is something I can keep enjoying doing.

2. Is there anything you think of that would help me?

I've already found some assets and tutorials but it's always nice to get direct ones from people who know it's decent than just using google.

If there's anything else you think I'd like to know, please do tell. :D

Thanks in advance!