How to make a simple 2D game for Android and Desktop?

Question

Java

There is a clear goal - to make a simple 2d-runner.
I am interested in the final result, I do not do it for a portfolio / training.
Deploy first of all on Android and windows desktop
it would be nice to have macOS and iOS (why not)
another option is an application for VK
I am good at Java, JavaFX is very good. Ready to learn new things if needed. The problem is that I DO NOT know how games are made)
With what to write? (only Unity comes to mind, I don't know anything else, but maybe there are good solutions for Java)
And what is the best way to distribute the desktop version? (Heard very easy and convenient via Steam)

Answer 1

Unity The
most cross-platform, the most friendly to beginners.

Answer 2

https://love2d.org/
Example and Play Mario in browser
Distribution platforms - Windows Dektop, Android, Linux, MacOSX, iOS, Web (via Emscripten).

Answer 3

libjdx is suitable for creating games on desktop, android, html5, you write everything in java. A game written for android will also work on a compluhter, nothing needs to be rewritten

Answer 4

www.slant.co has good comparisons. With a claim to objectivity.
For example:
Best 2D Engine
Best 2D Engine for Android

Answer 5

Definitely Unity.
I can help with general information, how to approach the development of an idea and make a competent project, what assets to use, how to optimize the game, which animation program to choose.
If interested, write.

Answer 6

If you know Java well, then IMHO it would be better to take something like LibGDX https://libgdx.badlogicgames.com/ (this one is mainly for 2D) or jMonkeyEngine jmonkeyengine.org (this one is mainly for 3D).
But you can take any non-Java engine, but then you have to learn the scripting language for this engine (for example, C# if unity, GDScript if Godot, or Lua if Corona SDK or Gideros).
PS Or take a thread constructor. where no programming is required (Construct 2, for example).

Answer 7

Korge - Modern Multiplatform Game Engine for Kotlin.
Kotlin + Korge = https://korge.org/
Kotlin/Native supports the following platforms:
macOS
iOS, tvOS, watchOS
Linux
Windows (MinGW)
Android NDK