I am glad to see websites popping up with blockchain gambling services. But blockchain lottery is nothing new, really. A lot of such projects like to make claims like "trustless and transparent" however they fail to provide an open source as well as a a smart contract audit and a non-custodial wallet experience. So unless your lottery system has been tried and proven by the community, I would not be ready to accept such grandiose claims. Decentralized does not automatically make it "provably fair".
Players can trust that the games are not rigged or manipulated
I think word trust should not be used together with "provably fair".