Which mobile game designer to choose?

Question

Mobile development

Hello everyone, I would like to ask those who know (I myself don’t know anything - a blank slate), which designer or engine (I don’t know how to do it right) to choose to create (I’m unlikely to ever do this) 2d games. (Directly interested in games like I-emperor, supreme mandarin, and emperor and concubines, they are all about the same thing, with the same implementation, they differ visually)
Requirements for the engine / designer:
1. Cross-platform
2. Online, by type you choose a server and play there (as I understand in the above games there is a constant communication with the server when you press any button, just like in browser-based Chinese MMOs)
3. If possible, simplicity (or prostate: D)
Well, I may have missed something, thanks for answers)

Answer 1

If you can work through code, then unity, but if you can’t work in programming, then construct 2/3, GameMaker