As a technological showpiece it's very impressive — the animation is smooth and the touch response instantaneous. As a game, or even interactive experience, it's limited by the lack of consequence to your actions. You could not touch the screen for the duration of the game and still see the same animations, story, and ending.
Unsurprisingly, The Bravest Man works best with Chrome for Android and iOS, but it will run reasonably well on Safari for iOS as well — we had some loading issues over multiple devices but once it was up and running there weren't any issues. We tried it with the stock Android browser and Internet Explorer for Windows Phone with no luck.