Looks good blag, I've found the gesture recognition hard sometimes to, to always get the response I want.
I guess some if it's holding a camera and doing it at the same time 
I made a keyboard interaction for leap, and at first I used a lot of gestures but then started to get annoyed by not getting 99% accurate responses.
So I switched to a more line cross design, or a time spent at certain position.
Steven
