I'm interesting to share the possitions of the players on the same map and send the actors possition for everybody ( like everybody can see what happenes with the map (scene). also the interaction like shot other player etc.
What I didn't know before trying to make this game is how different you have to make your behaviors in Stencyl to achieve what you want.
For example you can't share the positions of the players, you only send
your position to the server (because only the server knows anything about who the clients are) and then make a function to read that position message and display an image (of your enemy) based on those messages. If you have more than one opponent that function gets a little more complicated.
As for the shoot other player...again...you have to make your behavior for only 1 player, because every player runs the same behaviors, so you can't interact with the other players.
I had to make a custom extension for this, but right now I only have 2 blocks for it, and to transform the entire API into an extension I'd end up with over 150 blocks, and even if I'll somehow be able to do it you'd still have to do a lot of manual coding based on the game you want to make.