67 Speed Challenge（67 極速挑戰）是一款免費網頁遊戲：在約 20 秒內完成盡可能多次的「67」交替手勢（雙手上下擺動）， 以測量手部與手腕節奏速度。你可以使用 Webcam AI 手部追蹤（免安裝 App，MediaPipe 在瀏覽器本機推論）， 或使用鍵盤 6 與 7 鍵的後備模式。完成後可選擇提交呼號到全球排行榜，並用短間歇方式持續進步。
67 Speed Challenge is a free browser game that measures hand and wrist speed with the viral “67” alternating hand-pump gesture. Play in about 20 seconds with on-device webcam tracking or keyboard keys 6 & 7. Built by independent developer Steve Yeh — see About for the project story.
我們把重複的薄內容合併成較長、可實際操作的原創說明（含引擎參數、燈光實驗與示範訓練日誌）：
完整目錄：Blog 指南庫 · 長篇總覽：Game Guide · 新手：How to play
不需要。用 Chrome、Edge、Firefox 或 Safari 開啟本站即可。
常見原因：逆光、手伸出畫面、拳頭／手掌側對鏡頭、動作忽大忽小。請先完成 設定檢查清單；環境無法改善時改用鍵盤模式。
手勢追蹤設計為在你的裝置上執行。排行榜若提交，僅包含政策說明的成績相關資料，不是你的視訊內容。
A single arcade screen is fun, but players also need trustworthy explanations: how the detector works, how to light a room, how scoring math behaves, how to practice without hurting wrists, and how keyboard mode differs from webcam mode. 67game.store publishes those guides in plain language with engine-accurate numbers from the live build. Thin, overlapping posts were consolidated so each remaining article is meant to be bookmarked—not bulk SEO filler.
本站除了遊戲本身，也提供可驗證的說明文件與訓練筆記，讓第一次來到的使用者能理解「為什麼次數沒算到」以及「如何安全地變強」。
Every accepted rep awards points. The multiplier depends on your recent density: the client estimates reps-per-second over a rolling 2-second window. Rough bands in the shipping game: below ~3.5 RPS is base (10 pts), then HYPER (~20), GODLIKE (~35), and SUPER 67 (~60) as speed holds higher. That is why a smooth mid-fast run often beats a chaotic sprint that collapses after a few seconds. Full table and worked examples: Combo & scoring explained.
Webcam reps come from a peak–valley detector on each hand’s palm motion (amplitude scales with apparent hand size). Keyboard reps come from alternating 6/7. Treat the two modes as different events when comparing friends.
For a structured week, follow the 7-day plan with sample log numbers. For engineering curiosity, open the MediaPipe engine notes.
Site: 67game.store · Product: 67 Speed Challenge free browser game · Operator: Steve Yeh (independent developer) · Contact: contact form · Policies: Privacy, Terms, Fair play.
Camera frames used for hand tracking are processed in the browser for gameplay; we do not require uploading your video stream to count pumps. Optional leaderboard entries store callsign and score-related fields as described in the privacy policy. Educational guides on this site are original to the project and updated when game behavior changes.