How to create similar games on Android?

Question

Android

Good night everybody!

Screenshots of sample games

Why this particular game? I'm not going to invent a new Clash of Clans or a new GTA on the phone.
I'm interested in regular FLAT games. They catch on with their simplicity and interest.
And besides, this game is made with good taste in terms of design.
Specific questions also arise:
1. In what language are such games written (I often heard that almost all Android games are written in Java)
2. In what environment would you advise developers to write something like this so that you can immediately test your creation
3. What is written on design for such games and whether it is possible to use standard CSS styles (Probably one of the most important questions)

Answer 1

1. Java
2. Android Studio
3. No, css has nothing to do with it

Answer 2

1) The declarative language QML is easily and simply suitable for this matter
2) Qt Creator
3) Um ... Good taste in design? Maybe I'm not understanding something, but IMHO it's terrible.

Answer 3

1. They write on anything, but usually they take a ready-made engine and write on what is in the engine. It could be Java, it could be pros or something.
2. Normal modern game engines allow you to develop and test the game directly in the editor, without building on the device.
3. Usually the whole interface is made with pictures, in some engines you can also use SVG. So, by itself, there are a million options for displaying the necessary graphics on the screen, you can do everything with shaders. I have seen CSS support in a couple of engines through plugins and experimental modules, but more often they use a WYSIWYG editor for this.