Okay, as this thread and the op seems relatively active, even though the first post appeared back in summer, I'll leave my feedback here as well.
1. The website looks nice overall, but please change "informations' to "information" in the navigation below the main content of the first page.
2. Terms and conditions as a pure html file? Where's your design there? I think you should fix it.
3.
Not all Bitcoins may be withdrawn: Bitcoins credited to your Account as Winnings can be withdrawn anytime. However, if you deposit Bitcoins and do not play at all in the platform, you may withdraw unplayed Bitcoins only if your Account is closed.
What is this? Why can't a person withdraw the deposited money just because none was wagered? And how to close account to get that more or something? This seems unfair to me. Oh, and later on there's a point about the right of casino to use one's bitcoins after a year and a month of inactivity of the user - I think the period should be logner than that.
Good luck!