Do we have a blockchain-based demo casino? It would have most of the games, spins, and other popular games found in other casinos, but it would be in demo mode. This faucet limits you to certain games, I simply wish that there would be a casino among those in that table that would allow one to check out their feature and learn things without a single deposit until you become confident that you're are ready.
Many casinos have their own currencies or virtual tokens intended for internal use that you can play with but cannot withdraw into your wallet. For example, we have Tower Gold tokens at Tower.bet casino, BFG token from BetFury platform, JCC tokens from Jacksclub, and so on. Many of these tokens have no real value outside of the casino and are solely used for testing and playing games, and enjoying gambling without the risk of losing money.