I thought that the site has died already last year when there was no more updates here on their official thread. Anyway, why you did still play on this site while they have no active representatives on this forum?
Afaik it is owned by same person who manage dicecoin.io , and surprisingly the rep of dicecoin.io is also not active anymore here (last active almost at the same time time with the rep of cryptogames.io).
By the way, hope you did not make a big deposit there as I think there is no ways for you to get your money back.
I didn't see this post earlier but I am seeing dicecoin.io cryptogames.io and duckdice.io all owned by the same person. When you go to dicecoin.io it redirects to duckdice.io now as well. I ended up finding an old registrar page that listed an Edward jelly as the owner at one point (which also goes back to cryptogames.io). So with your info and what I found independently in seems like it would be fair to go to duckdice for support or compensation on lost deposits.
I dont think duckdice.io is owned by same person who own cryptogames and dicecoin.io. I just tried to open dicecoin.io but it does not direct me to duckdice. So I guess asking duckdice.io will not give you anything regarding your issue.