Is it possible for Construct 2 games to be played with LeapMotion?
In theory they have a JS API so someone might be able to make a plugin. Now whether someone would be willing to put in all that work for something relatively niche...
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If you use search, you'll come across a thread (somewhere) where a guy called thehen developed a plugin for c2 to use the leapmotion, but not sure if he ever finished it.