I have written a tutorial about creating online games using NodeJS and PhaserJS ( HTML5 game framework) please refer to the tutorial in this link ( in french) :
phaser[dot]io/news/2015/09/online-game-tutorial
or the source code in git :
github[dot]com/bmarwane/ajs_mmo_tutorial
*** please replace [dot] with a dot, i cannot insert a proper URL in the description ***
i do not garantee that i will be able to transform your game to an online game as i do not know anything about your game ( URL not working, i get a 403 http error, the link is probably not public) but i garantee that i will give you a quick answer about wheter or not i can complete this work.