Melonverse is a desktop metaverse gaming platform where I designed the complete blockchain infrastructure powering NFT-driven gameplay. I developed and deployed NFT contracts, marketplace contracts with auction mechanics, voting systems, and staking pools all gas-optimized and security-hardened. I then integrated these contracts into Unity3D, creating event-based on-chain interactions that improved player engagement while keeping blockchain functionality seamless and non-intrusive. The marketplace smart contracts and auction systems I built drove significant growth in transaction volume. By handling both Solidity development and Unity integration, I delivered an end-to-end Web3 gaming solution where digital ownership and gameplay are genuinely interconnected.