5da6033704
Features: - 2-8 player multiplayer via Socket.io WebSocket - Real-time board synchronization - all players see all boards - Battle royale mechanic: clearing rows sends garbage to opponents - Classic Tetris gameplay with all 7 tetrominoes - Retro visual styling with CRT scanlines and pixel font - Automatic level progression and speed increase - Player elimination and winner announcement Files: - server/index.js: Node.js + Socket.io game server - public/js/: Frontend game logic, rendering, network, and UI - public/css/style.css: Retro Tetris styling - README.md: Setup and usage instructions - PLAN.md: Implementation plan with all phases completed