The problem Expanding Flippando solves

It's a classic memory game with a twist: the game cannot be gamed (pun intended), so players must complete a game in order to mint the actual NFT. This innovation makes the game suitable for proof or work (or Proof of Attention). The basic boards assembled can be used by any other players except the creator, to generate beautiful NFT art. When this happens, the basic board is burned, and the creator received the fungible token $FLIPND locked inside.

Challenges I ran into

The initial Solidity contract of the game evolved into a collection of 5 separate contracts, with a specific pausable / upgrade pattern that makes the upgrade process of the game (adding new tiles, improved functionality, fixing bugs) extremely flexible, without necessarily running into the troubles or limitations of the standard proxy pattern deploy.

Smart Contract Address(es)

"tileRegistryAddress": "0xD60DD6c1D92B4953b971df04a6e044C26f6FAB64",
"flippandoAddress": "0xbBad34C56F49E42ADeC00386e77686c661226C70",
"flipAddress": "0xC2263C21AC2259bB43eFecE0c4911e2F359E317e",
"flippandoBundlerAddress": "0xA052ea918423b6317a54B3d2142a1E9098593853",
"flippandoGameMasterAddress": "0x734e8d7Ed6d4def9453EC10F61916cCc1742e3aE",

Other Onchain Proof

https://basescan.org/token/0xA052ea918423b6317a54B3d2142a1E9098593853

you can see actual art NFTS created with basic boards under the "Flippando Art Gallery" token tracker.