Adwords accept html5 ads made in Flash CC 2015. I made 3 campaigns last week using flash cc 2015 but:
1. if you use adwords.com interface - All js scripts libraries must be included in zip file. Only DoubleClick allow external scripts.
2. You have to put: <meta name="ad.size" content="width=300,height=250"> where width and height are your ad size maually to html file generated from flash
3. Your ad must stop after 30sec. - I recommend little shorter time for ex. 28sec. - when i set 30sec in my ad google reject my ads - maybe they count load time also...