I'll take some time tonight to make it a bit better at dealing with different shapes of Bs. If you want to know what the 'canonical' stroke pattern is, you can click on the little graphics above the tablet. They will animate to show you the expected stroke path (although, it should just work, so I'll fix that tonight)

It didn't work with how I normally write B either (drawing downwards from the top-left corner), but I did find a method that worked: start at the bottom-left corner, move up to the top, then draw a "3"

Same thing for me on O. I tried clockwise, counter clockwise both failed.

Then I tried starting from top instead of bottom. Don't people start from bottom? It should be easier to align.

Oh goodness, haha. Doing this project I've learned that there is a great deal of variety in handwriting style. Single-stroke vs. Multi-stroke 5 for example, seems to be a big point of contention. I'll extend the decision tree to be more friendly about bottom-starting strokes.

I start many of my letters from the bottom, and everyone tells me I write opposite-handed. This recognizer definitely had problems with the way I would naturally write a lot of the letters...