META: HM3 ads

I just updated the HeroMachine 3 app page to support Google Ads. It seems to work but the code is weirding me out, so if you see anything not behaving correctly, please let me know.

I believe I have it set up where if you go to the widescreen view, the ad disappears so you can see the entire canvas, and then it comes back when you return to the default. Again, if not, holler.