# Tetris V0 Template: The Falling-Blocks Playbook for React Developers - Tool: V0 Templates - Last updated: July 2026 ## TL;DR The Tetris v0 template is a complete browser falling-blocks game built with Next.js, HTML5 Canvas, and useReducer. It ships with all 7 standard tetrominoes, ghost piece rendering, line clearing with Tetris scoring, and a level progression system. Fork it, ship it to Vercel, and use the prompt pack to add touch controls, a hold piece, localStorage high scores, or a Supabase leaderboard. ## Frequently asked questions ### Is this template actually called 'Tetris' — is that a trademark issue? Tetris is a trademarked name owned by The Tetris Company. This v0.dev community template is named Tetris in the community listing, and you can reference it by that name factually. However, if you ship a product based on this template, use a different name — 'falling blocks game', 'block puzzle', or your own brand name — to avoid trademark conflicts with commercial Tetris rights holders. ### Is this template free to fork and use? Yes. Forking v0.dev community templates is free with a v0.dev account. The fork itself consumes no credits. V0 chat prompts that modify the code do consume credits. Deploying to Vercel is free on the Hobby tier. Any third-party packages you add (shadcn/ui, canvas-confetti) are MIT licensed. ### Can I use this template in a commercial product? You own the code output from your V0 fork and can use it commercially. Remember to rename the game away from 'Tetris' in your product (see the trademark note above). The underlying libraries (Next.js, shadcn/ui) are MIT licensed and permit commercial use. ### Why does my fork break in V0 preview — pieces fall at double speed? This is the React StrictMode setInterval bug. In development, StrictMode double-invokes effects, causing two setInterval calls to stack without cleanup. The fix: store the interval ID in a useRef and return clearInterval from the useEffect. Crucially, this bug only appears in development — the deployed Vercel URL runs correctly. ### The rotation doesn't work properly at the walls — how do I fix it? The base template doesn't implement Super Rotation System wall kicks. Copy the fix_prompt from the 'Rotating tetrominoes at walls' gotcha above into V0 chat. It adds a +1/-1 X offset test after each rotation, which handles the most common edge cases without requiring a full SRS implementation. ### How do I add sound effects to the game? Pull the code locally via the GitHub Git panel and add sound effects using the Web Audio API. Create an AudioContext and use oscillators or AudioBuffer playback for line clears, tetromino locks, and game over. V0 chat can scaffold the AudioContext setup, but testing audio in V0's preview sandbox is unreliable — test on the deployed Vercel URL. ### How do I connect a global leaderboard database? Use the Supabase leaderboard prompt from the prompt pack above. Create a Supabase project, add a tetris_scores table with RLS for anonymous inserts and selects, then paste NEXT_PUBLIC_SUPABASE_URL and NEXT_PUBLIC_SUPABASE_ANON_KEY into the V0 Vars panel. The prompt handles the Server Action and leaderboard UI. ### Can RapidDev extend this template with a leaderboard and social sharing? Yes. RapidDev extends V0 game prototypes with leaderboards, analytics, and social sharing ready for production launch. Visit rapidevelopers.com to discuss your game project. --- Source: https://www.rapidevelopers.com/v0-template/tetris © RapidDev — https://www.rapidevelopers.com/v0-template/tetris