Playground is an AI-native gaming platform on Robinhood Chain where a user describes a game in plain language and the platform builds a playable browser game from that description. Published games are listed in a public catalogue at pbux.io, where other people play them, star them and fund prize pools. PBUX is the platform's unit of account: it is spent to publish a game, to enter prize matches, and to fund the pools those matches pay out. The platform also runs the Robinhood Derby, an on-chain parimutuel race settled once a day, in which each runner is a real token and the pool is paid to backers of the winner in ETH. The token was deployed on 5 August 2026 through a bonding curve with no team allocation and no pre-sale, and its contract is verified and has no owner.