Board Thread:Shadow Fight 2 Discussion/@comment-219.91.134.131-20160823025920/@comment-25669516-20180415121727

Look, Nekki definitely has plans for the game but I'm not at the liberty to answer the what/when/where/why/hows of it. They will announce everything in their own time. They have not abandoned the game, but don't expect an update anytime soon either. As of now you'll just have to wait or switch to an Android/iOS device if you don't want to.

And nope, they have not updated it on Windows phone either. Only iOS and Android have the most recent version of the game afaik.