First thing I saw when visiting their website was a request to comply with KYC... This casino has very little online presence so it's hard to trust someone asking for your full name and address while not even proving they're registered as a company. Nowhere in their landing page did I see any company registration information or anything as such. Even their domain was registered very recently and is under the name of some obscure privacy provider:
https://who.is/whois/leonmonaco.comI wouldn't trust this casino unless they did more to work with the community at first.