I just downloaded It from here last night, my issue was just the Heyzap test adverts were showing, but after about 10 mins the real adverts showed up. It appears to be working now.
Does anyone know how Admob works with Heyzap now that it is built into stencyl? Do I remove the admob extension? I have set up the admob code in hey zap but haven't added it in Stencyl?