Making the game online was one of my original design ideas for the game. A cooperative mode was under study in 2018 after I released version 1.2, and I came to the conclusion it required a lot of work and would probably need to be developed as a different game, since the modifications would make the game unstable. I might do that after Archaelund is released; until then I am afraid Exiled Kingdoms is not open to community development, but if you really want to make an online game with similar gameplay, go ahead and make it, I am sure many players would love it and it would be easier to start from scratch than to modify current code.
Locking this thread, since the question was answered.