Seems to be matching against one particular typeface, and is very sensitive to how similar what you write is to that typeface. The first thing I tried was a lowercase "a," which, in my handwriting, is a one-story "a," and it had no idea what it was. Likewise it guessed poorly at my lowercase "f" because the top of my "f" curves back down, and its doesn't, etc. Seems like it would benefit from a dataset with more variations on how various characters are written in practice.

Neat concept though!