🧊 LetCube 功能截圖
開發中的搶先畫面。完全免費、零廣告、不收集資料、完全離線，iPhone / iPad 都能玩。
🛠 開發中畫面，實際上架可能微調
卡住了？App 會先「示範一次」：要轉的那一面浮起強調、胖胖的弧形箭頭標出順逆時針，Ease-In-Out 慢慢轉，小孩眼睛跟得上。不用背 R U R' U' 這種公式。Stuck? The app shows you first — the face to turn lifts and highlights, fat curved arrows mark clockwise or counter-clockwise, and it eases in and out slowly so kids can follow. No R U R' U' notation to memorize.
看完示範換小孩自己轉。發光箭頭指哪一層、往哪個方向，跟著撥就對了。下方工具列有提示、重做、重來和聲音開關，轉錯了也能一鍵回到正確的路。After the demo, it's the child's turn. Glowing arrows show which layer to turn and which way — just follow them. The toolbar has hints, undo, restart and a sound toggle, so a wrong turn is easy to walk back.
每一課完成就「You did it!」——三顆星、加經驗值（XP）、升等，還有彩帶慶祝。可以「再玩一次」或直接「下一課」，一課一課把復原魔方學起來。Finish a lesson and it's "You did it!" — three stars, XP, a level-up and a confetti burst. Play again or jump straight to the next lesson, learning to solve the cube one step at a time.
專為兒童設計：完全離線、零廣告、不收集資料。相機畫面只在記憶體取樣顏色、用完即棄，絕不儲存或上傳。音效是 LetCube 自製的 CC0 音，求解用開源的 Min2Phase。Made for kids: fully offline, zero ads, no data collected. The camera only samples colors in memory and discards them — never saved or uploaded. Sounds are LetCube's own CC0 tones; solving uses the open-source Min2Phase solver.