The core concept of 100 Floors is simple. On each floor you're presented with a single screen containing an elevator door that you've got to figure out how to open. Tap, swipe, pinch, and do other things that your mobile device is capable of doing until finally the level is clear. "Wait a minute," I hear you exclaim. "Isn't this just DOOORS with an elevator and a bunch of new levels?" To which I reply, "Yes. Why, is there something wrong with that?!"