An experienced javascripter can finish and test monetization plugins like this in 2 days, so there is no excuse for not having this or after all this time having admob, but not having native HTML 5 ads like adsense or adsense for games. It's absurd.
You can't put Adsence in games as it goes against their placement policy.
HTML5 AdSense for games is still in beta, and AdSense for games requires a million impressions a month before you apply.