I hate not having any other comment to make but I think you would benefit from trying to optimise the size of the main banner image [1]. It's currently clocking in at just under 800KB, and loading it was like downloading an image on dial-up on my very reasonable 30Mbps. Even after reloading a few times it took me 16.8 seconds to download.

Good luck with your app and congratulations on shipping.

[1] http://images.tamper.io/morning/img/largebg.png