Hi ceosol,
I've tried with messenger, but no sound.
For size, I've tried to clean unused actors or scenes, but I'm still on 4Mb of js. So I don't know how to have a size of no more then 3Mb.
Moreover, I've seen some game that have (and that I think are) a lot of graphic, multiple scene and connection to services, so I'm sure that that instant game are much bigger than mine. Anyway, FB have a limit of 200MB for instant game, so my project of 4MB shouldn't be so heavy. So I think that it's something about lime/haxe/openfl and Stencyl that have some problem with export for html5 and loader optimization.