Get four of your balls in a row — vertically, horizontally, or diagonally — on the 4×4×4 board.
Balls drop to the lowest empty slot of each rod. Rotate the board with one finger, pinch to zoom.
Tap a rod twice to confirm your move.
There are two modes. Play the AI offers eight difficulty levels. Play Someone Nearby lets you play 1‑on‑1 with someone in the same place — no server required; devices talk directly to each other.
FAQ
Q. How many times can I undo?
A. Once per game without penalty. Further undos are allowed, but the game will no longer count toward your record.
Q. Higher levels are locked.
A. Win the required number of games at each level to unlock the next.
Q. Can I turn off the red/gold hint balls?
A. Yes — open Settings (gear icon, top right) and toggle each assist.
Q. How do I reset my record?
A. Use "Clear Log (restart from Lv1)" in the Match Log screen.
Q. How do I start "Play Someone Nearby"?
A. Pick "Play Someone Nearby" from the title screen while your opponent opens the same screen. Both devices must be on the same Wi‑Fi, or have Wi‑Fi or Bluetooth turned on. You'll be asked to allow Local Network access the first time.
Q. No opponent is found.
A. Check that Wi‑Fi or Bluetooth is on for both devices, and that the app is allowed under Settings > Privacy & Security > Local Network.
Q. Does nearby-match history mix with the AI record?
A. No. "Play Someone Nearby" results are stored separately from your AI record. A match interrupted by a dropped connection is not recorded.