Cool! I got a weird feeling when playing with it, it's just something very satisfying in seeing it be completed

Now we just need the mobile app

The actual drawing experience is really satisfying. A couple usability tweaks I did just fiddling in the DOM: - Put the output and inputs side by side - Put the "actions", export, clear, etc. pinned to the bottom - The overall goal being zero scrolling

After that it was quite fun and I enjoyed the options you gave for things like brush size, metallics, gradients, etc. Nice!

fwiw Krita has a similar setting in its brush tool - you draw a stroke and said brush stroke is mirrored by a given x axis or a given y axis (or both)