I've bought some shares. Here is some constructive criticism for the people in charge.

You need to get higher on google results. A search for "casino bitcoin" and you are second. You should be first. A search for bitcoin casino and you are ninth or so. You should be higher.

Also, in regards to the site design, I think it could slightly better. For some reason, I feel like it should be darker themed. I have no idea why I feel that way. It has a decent, functional layout, though.

Do you have any security options with the site at all? Maybe email withdrawal verification or SMS 2FA. Not everybody will use it, but it may make some people more inclined to use your site if you make it available.

Just my two cents.