It was a long way moving to the online version of the game. The main problem was that two years ago we knew nothing about multiplayer programming. We don`t want to say that we are experts now, but we have built dedicated server and have written server manager that could run a lot of them distributing to several PCs. Also we have rewritten almost all game logic because it was targeting local machine. And now we can say that if you want to write online game, don't start with local one, better build online code from the beginning.
At least the game is ready for public testing. There are some (quite a lot) bugs, but we are working on them. We have played the game several times without noticing any significant issues.