Found the "Microsoft Virtual Academy" and spotted a quick course on "Game design using HTML5."
That just sounds too easy to ignore.
Installing my 90-day trial of MS Visual Studio Ultimate right now
There's a free version of Visual Studio called Visual Studio Community Edition that you can get. It has most of the features you'll need, and is free for commercial use as well. I'd look into that - because I'm sure you won't use most of what Ultimate has that the Community Edition doesn't.