GhostAlien is a sustainable play-to-earn space shooter built on Polygon blockchain. Players pilot neon starships across cosmic battlefields, collecting coins and NFTs while competing for leaderboard dominance. The game features invite-only access to maintain economic stability and NFT-gated gameplay that unlocks different reward layers based on holdings. Built with sustainable tokenomics that balance income inflows with reward outflows, GhostAlien offers fast, low-cost transactions on Polygon while providing skill-based rewards tied to effort and engagement rather than unlimited emissions.