This is real Minecraft (1.8) compiled to javascript thanks to the TeaVM and Eaglercraft projects
You can Join the multiplayer server by either by pressing the play button and playing in your browser,
or playing in the official (or cracked) Minecraft launcher by going to the server mc.stonklat.com
Minecraft 1.12.2 is OUT in BETA TESTING! Please report any problems!
Minecraft 1.12.2 has 2 versions. Javascript and Webassembly; Webassembly offers better performance (more fps) but it does not work on every browser. If it doesn't work for you use the Javascript version as an alternative.