From what I can see, the design looks sleek and modern, which is definitely a good thing for an online casino. The color scheme is very appealing to the eye and the contrast between white and black is very well done. However, one thing I would like to mention is that I have always found dark themes for online casinos more appealing, as they can give off a more sophisticated and upscale vibe and are more suitable for playing at night. The fact that your casino does not have one is a bit of a letdown, but it's certainly not a deal breaker. 

That being said, I do think this design's sleek and modern look is still very visually appealing and could attract a wide range of players.