Very cool idea!
I liked how seamless popping into the cabinets was, and also I had a great laugh to myself when I realized that buttons on the wall were changing the volume! No UI indeed!
My only complaint, and I feel this holds the game back, is that the minigames on the cabinets do not feel tight. They feel quite sluggish, which is not something I would associate with an arcade game. Other than that, very cool!