Sorry, but not now. I still have hope of making some money from this, since I'm not really aware of any HTML5 image editor which outclasses my app.

Even though it doesn't earn me anything right now, I am just a little hesitant to share all the details about how it works. A lot of the specific canvas techniques I had figure out myself, and I'd rather not share all my tricks for free right away.

I did want to share some of the techniques I used in the form of blog articles however. I wrote one already on how to connect a series of points to draw a smooth curve: http://yangcanvas.com/smoothcurves