I don't read German so can't comment on the small bit of content. Obviously needs lots of content, but I guess it's in the early stages? I like the general design and it's pleasing to the eye. Great actually. Keep up the good work... add content!
A new take on casino site's! Looks good (I'm glad you didn't overuse the green color scheme that most people use for your niche). What I would do is make the bar on top (with the rounded edges) more wider so it aligns with the header and layout below. (It looks to short for me.. maybe it's an FF error?)