Hi jscottk, the thumbs-down and up gestures work better if you tilt them towards you so that the Leap sees more of the hand. Alternatively, you can use SPACE for thumbs-down (randomize) and S for thumbs-up (saving).

This thing is clearly capable of generating some spectacular imagery. I love how explosive and psychedelic the meshes are - it's like having several buckets of paint thrown in your face at the same time and freezing time to appreciate the chaos. The generated tones create a distinct aura that just adds to the atmosphere. Unfortunately I wasn't able to get the thumb-up or thumbs-down gestures to fire but I may have not given it enough tries. Overall a really great experience, thanks for sharing.