Checked your site out and I felt that the design of your site is decent overall. You need to focus on promoting and advertising your site through different methods(Signature campaigns, bounties etc) in order to attract gamblers.
Advertising is crucial since crypto poker sites usually succumb to liquidity issues based on what I have observed.
i like how you prioritize bitcoin more than anything else and maybe this is the reason why you are charging extra fee if users prefer alts instead of btc , this idea can force players to gamble with btc only if they really find the site entertaining but if not they can effortlesly switch to other poker sites that accept many coins without a catch.
This isn't a good thing IMO. Players should be given multiple options to choose from especially when the TX times and fees of BTC and ETH are skyrocketing these days.