Here is my newest version of the gesture recognition engine. It now can do 0-4. Remember to hold the mouse button while making the number and to adjust the world view to its maximum size that doesn't cut anything off.
PS- to make a zero, make a
fat counterclockwise 0, and to make a four, make the straight down part first, then release the button and click again in the top right corner to make the hook thing.
PPS- Isn't this file size tiny? I guess that is what happens when your only object is 3d text