I can name the exact moment that I fell in love with Harmonix' latest game, Fantasia: Music Evolved, at this year's E3. Periodically throughout the game, you're presented with an on-screen globe, and you can wave your hand over it to create a tune. The science of how it works isn't exactly clear (you're adjusting the pitch and rhythm of a tone somehow), but though the tool is simple, it works, and the game will periodically play back your creation to you, and then allow you to redraw it over if you don't like it. Once the tune is set, you can swipe both your arms outward to zoom out to the game's "overworld" level, which in this case was a beautifully rendered, very animated robot factory, with various pipes and pistons jumping up and down in time with a rhythm.

This was the moment Fantasia showed me just how magical it was. As I tried to navigate around the stage and solve a problem by manipulating the world with the Xbox One's new Kinect sensor (a group of robots needed to get into a small doorway, so I had to swipe over some magic to shrink them down to fit), I suddenly realized that I recognized the tune that the pipes and valves were dancing to in the background. It was the one I'd just made, subtly mixed into the rhythms of the stage itself.