This website and the marketplace Magic Eden are the only interface which allows members to exchange Flappy Birds digital relics.

Members are totally responsible for the safety and management of their own private wallets and validating all transactions and agreements generated before approval. Furthermore, as the Flappy Birds NFT marketplace smart contract runs on the Solana beta main-net, there is no ability to undo, reverse, or restore any transactions.
OWNERSHIP
Do I own my Flappy Birds NFT?
Every Flappy Bird is an NFT on the Solana blockchain. When you buy a Flappy Bird NFT, you immediately have rights to own the underlying Flappy Birds NFT Art. Ownership of the NFT is occurred wholly by the Smart Contract on the Solana main-net.
Personal Use.
On condition to your continued compliance with these terms, the creators grants you a worldwide, royalty-free license to use your Flappy Birds NFT, copy, and show your purchased art. Only the Flappy Birds NFT original logo remains a protected trademark which belong to the team.
Commercial Use.
On condition to your continued compliance with these Terms, creators grant you an unlimited, worldwide license to use, copy, and show the purchased Art of the 7777 Birds for the purpose of creating any derivative works based upon original Flappy Birds NFTs. Only the Flappy Birds original logo remains a protected trademark which belongs to the team.
Some examples of such commercial use would be the use of Flappy Birds NFT art to make hoodies, t-shirts, or necklaces (or any other materials) using the art of Flappy Birds NFT as a visual basis for the product(s).