Multi-code disipline item needed - in game Ad server,

I want to direct money into from my game “Wrectified” but I don’t think I am skilled enough to mix in Html and java etc, is there any way some one can make a generic loading screen resource that shows ads?

Also this is the only part of the game that will be compiled, the rest will be open source, so security is another issue

I would like to funnel money for BGE growth, but this is a bit out of my league,