Are there no ads which run on a web published game? This would work on any platform in almost any browser. :/
There are various add companies offering web page adds which you could use in a framing context; either as a layer above your game as an iframe, or the frame sizing you can set/choose when exporting.
But these require you to embed a bit of code from their sdk's; generally a bit of javascript and html which you can place in a project file an d then load this project file in the desired frame.