I've played the map with my friends as well, but it seems that the chat was still not fixed. I'm pretty sure you just have to switch /r with /a for the chat.
Oh, if you need Korean translation, I can do it. Just tell me.
The map could be for multiplayer if you make it /a. Well, as long as they stick together like how I did with my friends.
I'll start working on the translation and somehow get this map out to the Koreans as well.
That was awesome. About the only criticism I could find was the lag. The bugs I encountered were completely self-inflicted because I spawned in redstone torches for lighting and broke some redstone in the ceiling with them presumably. Retried and it worked fine that time.
I wonder if you could work in "the imaginary friend" as a custom textured enderman at some point in the map?