Strange! It's still working for me. Did you move the index, middle, ring and pinky finger onto the palm?
The game detects poses by whether the fingers are in the air or on the palm. The hand starts in a 'neutral position', where the fingers are considered neither fully extended ("in the air") nor on the palm. All five fingers must be moved to form the thumbs up.
Thanks! I guess I didn't put the fingers close enough to the palm. Wonderful job on this, it's such a fun and creative concept and it could make for a nice mobile game, maybe to fit the hand on the screen you could put it in portrait mode and have the hand take up the whole screen, and put the clue at the top.