Rather Interesting indeed.
I noticed some heavy referencing from Portal 2. Nice. But makes this somewhat unoriginal. Other than that, it's a rather unique and addicting game. Although even for a smart gun, I'm not quite sure how it could "sense" a strong force ahead. And ti can't be THAT smart if it let the professor throw it in the cave in the first place.
But never-the-less, keep up the good work.