I checked this site out and was surprised that it looks pretty decent. A few things in your main post where you have the url "http://...." change it to "https://..." so it goes to the SSL.

I've tried it out on mobile and was pretty easy to navigate. However it took me a while to find the faucet first, maybe make a direct link somewhere to the faucet. Basically for anyone that can't find it on mobile, just tap on your balance and click the 3rd button from the left, basically the hand holding the BTC.

Also I don't know if this was intentional or not but when you tap "PLAY!" you see the 3 dice rotating and it takes like 5 seconds to get the bet to actually process. Its fine at first but after a few hundreds of bets people won't like the delay, maybe make the delay 1 second instead to prevent any bots.

Either way good luck.