Stakk
Free · play online in your browser, no download
A competitive block puzzle: clear rows and columns to send junk to your rivals, in 99-player lobbies, ranked 1v1 or against bots.
Official site stakk.fun, verified Nov 3, 2026. Entry URL submitted by the entrant in the official Vibe Jam 2026 games data under x.com/Ultramouk; the game page's credit “Created by Mook” links the same X profile.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleased · Mobile support per the entrant's jam answerFree
Runs in a desktop or mobile browser. No download.
Browser (no download) · Mobile · Official link verified Nov 3, 2026.
- View on GitHubGitHubReleased · Windows desktop client v0.1.0Free
Download from the GitHub releases page.
Desktop · Official link verified Nov 3, 2026.
About Stakk
A competitive block puzzle in the browser. You place sets of three pieces on your board and fill whole rows or columns to clear them, and every clear sends junk to your opponent's board. Clearing lines also earns energy for a shield, held with the right mouse button, that blocks all incoming junk while it drains. The modes are a multiplayer lobby for up to 99 players in which the last one standing wins, ranked 1v1 matches in which everyone starts at 0 Elo and climbs tiers (ranked play needs an account), matches against a computer bot on easy, medium or hard, and hand-crafted puzzles; a tutorial walks through the basics. The entrant's pitch reads “Block Blast, Multiplayer, Tetris 99/Tetr.io” and names Tetris and Block Blast as the inspiration. It was made for the Cursor Vibe Jam 2026, whose rules required at least 90% of each game's code to be written by AI; the official submission lists Claude Code as the tool. It finished 215th of 945 entries. Free in the browser, with a Windows desktop client (version 0.1.0) offered as a download from the game page.
How it was built
Partially verifiedIn the official Vibe Jam 2026 submission the entrant lists Claude Code as the tool and answers Yes to the AI-written field. No devlog describes how Claude Code was used or which model ran it, and the submission covers the jam version only.
- OfficialJam rule 3: at least 90% of the code has to be written by AI. — Vibe Jam (Pieter Levels)
Built for the Cursor Vibe Jam 2026 as a Next.js web app, with Claude Code named as the tool; the entrant gives ThreeJS as the engine. Accounts, ranked matches and lobbies run on the game's own servers, and a separate Windows client is published on GitHub.
- Engine / framework
- Three.js
- Languages
- Not disclosed
- Team size
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
Verification notes: Tool (Claude Code), engine (ThreeJS), genre (Puzzle, Competitive Block Puzzle), pitch, inspiration and the multiplayer (Yes), mobile (Yes) and portal (Yes) flags from the entrant's answers in the official Vibe Jam 2026 games data (submitted 10 Apr 2026, 18:39 UTC; final rank 215 of 945 entries, no award), re-read on 5 Nov 2026; rule 3 on the jam page requires at least 90% AI-written code. The engine is the entrant's answer only; the scripts loaded on the start screen did not show Three.js. Developer: the jam data gives x.com/Ultramouk (the profile could not be read on 5 Nov 2026), and the game page credits “Created by Mook” with a link to that profile; the Windows client is published by the GitHub account Wmoook, linked from the game page. No full name, location or team size is given. Modes, rules, the shield and the tutorial texts come from the game's script; the game was not played and the Windows client was not run. The VS Bot opponents are ordinary computer players: no calls to AI services were found in the game's code. Pieces, rows and columns, Elo and tiers are the game's own; the entrant names Tetris 99, Tetr.io and Block Blast as inspiration only. The release date is not stated; the jam submission is dated 10 Apr 2026.
Development history
Entered in the Cursor Vibe Jam 2026 (submission date in the official games data, 18:39 UTC); the jam required at least 90% AI-written code. Final rank 215 of 945 entries, no award.
Game performance
Each figure measures something different — concurrent players, owners, downloads and sales are never interchangeable and are never added together. Labels show where each number comes from.
Browser (official site)
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
GitHub
Not publicly available: GitHub stars.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| Cursor Vibe Jam 2026 — rules, prizes and game stats Vibe Jam (Pieter Levels) | Official site | Not confirmed | Nov 3, 2026 |
| Vibe Jam 2026 games data (entrant submissions, final rank, awards) Vibe Jam | Official site | Not confirmed | Nov 3, 2026 |
| STAKK (game page and script) Mook | Official site | Not confirmed | Nov 3, 2026 |
| Wmoook/stakk-releases — STAKK desktop client releases GitHub | Repository | Not confirmed | Nov 3, 2026 |
| @Ultramouk — X profile (linked from the game page credit) X | Social post | Not confirmed | Nov 3, 2026 |
| Official game page (language check) Mook | Official site | Not confirmed | Nov 3, 2026 |
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