A tip(s), if you want to get a quick reference to how CS games commonly constructed, you can code-dive existing games or WIPs around this forum.
Summary
Here’s a thread that discusses the How-To of code diving, although the info is a bit everywhere depending on which game you’re code diving. But feel free to ask something in there.
How To See Other Games' Code (current info posted in OP and Post 146 on 6/18/19)