I just launched the very first version (let's call it v0.1 beta) of the TGC widget creator. It's a simple tool that creates embeddable widgets with game info and a 'buy now' button, that you can place on your website.
I plan to add more customisation options to it soon. If there are questions or suggestions, feel free to post them here, or post them over at Github issues (click the 'support' link on the site).
I've added some information in the original post.
I will expand the website itself as well, adding some more information on there about what exactly it does, but first I'm working on customisation options and different sizes of widgets.
Is there anything specific that you want to know at this point?
I was confused by the fact it was an iframe; I assumed that is was serving up generated HTML instead of loading HTML that call the API.
I figured that out shortly after posting after poking around the GitHub source.