be sure your tool tracking is working on visualizer. LEAP software 2.1.1 has issue on tool tracking. soulution is here.
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I enjoyed it as similar type of person who make cooking game.
I also considered using pinch for controll and mount Leap Motion on Oculus.
But it was too sensitive and not so straight of start. However the difficulity of control, the whole atmosphere of kitchen and challeng of many things are lot of fun!