I’ve played there quite a bit, and from my experience, the slots behave like they do on other reputable sites
https://gogogoldslots.com/ . They use well-known providers like NetEnt and Pragmatic Play, so the RNG should be legit. Of course, there are streaks—sometimes you win, sometimes you don’t—but that’s just how slots work. I don’t think they have provably fair games like some crypto casinos, though.