Hm. Still no provably fair algorithm. Very disappointing and shady. How hard is it to copy code that you already have and paste it here or on the site?
I would be careful with this site - it is basically not provably fair.
From what I can see, it does use provably fair. Go to the main page, look in the lower panel and click the first link which says Fairness, you will see you are given a Client Seed and a hashed Server seed. You are given the option of changing the client seed, so its definitely provably fair.
I haven't gone thru the manual calculation and testing if the actual seed works but I would assume so. My guess is the site is hard to navigate for some people, especially on mobile so maybe you had trouble locating this but its definately there.