KorGE Game Engine
It works for Desktop, Web and Mobile. But allows to create other targets easily. And it is full asynchronous so it is nice to web.
KorGE uses intelliJ as IDE + Gradle for building. You can check how to set-up the environment here.
Kotlin.JS and Kotlin.Native
- It is planned a target for AS3 Adobe AIR (iOS and Android).
- A C# target for UWP applications.
- And native C++ targets for iOS, Android and other platforms.
Soywiz's korlibs are very portable so they can adapt to every major platform.