I think "Show HN" was the right decision. If it was "Ask HN" I would have not looked at it. It's also nice to see you made the source code available too. I have

I think "Show HN" was the right decision. If it was "Ask HN" I would have not looked at it. It's also nice to see you made the source code available too. I haven't looked at the code yet, but it's good to know its out there. I tested the app with an older version of chrome (24) and it worked well. Drawing and downloading was successful, although my supposed "artistic" skills are more than a bit embarrassing. I saw no errors when opening the downloaded file in gimp. I liked how you used a transparent background in the image --this violated the principle-of-least surprise due to the white background of the website, but at least for me it was a pleasant surprise. Lastly, two possible suggested improvements, well three actually. (1) Allow background color to be set on resulting image (i.e. no surprises). (2) Enable sharing the image as a link of some sort, or via social media, or something like that. (3) Auto-detect viewport size and size the new image/canvas accordingly.