# Markets One of the key differences between Tetris and other casual games is that nearly all the assets you earn from the game belong to you. Assets in Tetris mean almost everything you get in the game, Tetris, TETs, VSYS, tickets, etc. Players have full rights over their assets, such as trading them with other players, gifting them to friends or even destroying them without permission from the game or the development team. The market is the center for users to trade assets. Players can freely purchase game assets such as NFT cube people from other players, and can also sell their own NFT cube people. The Tetris market smart contract automatically collects service fees and royalties (collected in the form of TET tokens) from buyers and sellers who purchase NFTs in the market. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://tetriverse-white-paper.gitbook.io/tetriverse-white-paper/markets-and-liquidity-pools/markets.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.