Doesn't work very well if at all. I tried two times a very simple Chinese character (木) and it was never in the result list. Edit: didn't work with a very simple cuneiform character either.
The main reason something like this might be useful (since I live near Chinese neighborhoods in the SF Bay Area) would be to recognize Chinese characters, at least those that aren't too difficult to draw. So I hope they can be added.
There's many good existing pieces of software specialised in recognising handwritten CJK characters, which understand stroke order and so on. I think the value of this piece of software is that it's for everything else.