Questions, bug reports, and suggestions are welcome. You can also send feedback from Home → Settings → Feedback. When reporting an issue, include your device model, Android or iOS version, game version, level number, and a short description. You can attach a screenshot to your email. The game version appears at the bottom of Settings. Please do not send passwords or payment details.

Frequently asked questions

How do I play?

Find Chang’e on the colorful board. Each row, column, and color region must contain exactly one Chang’e, and no two can touch, even diagonally. Cross out impossible squares and find every Chang’e to finish the puzzle. A tutorial introduces the controls when you first play.

How do I mark squares and place Chang’e?

Tap a square to add or remove an ×. Quickly double-tap the same square to place Chang’e. Swipe from an empty square to add several × marks, or from a marked square to remove them. An × is your own note; it does not mean the game has confirmed that square is incorrect.

Why is a placement incorrect?

A placement must satisfy the row, column, color region, and no-touching rules together. An incorrect placement costs a life. Tapping or swiping to add × marks does not cost lives. If you are stuck, review the positions you have established or try an exclusion hint.

What do the tools do?

“Find Chang’e” helps identify a correct position. “Exclusion hint” explains a deduction for ruling out squares. “Pigsy” helps with some squares and unlocks at level 18. You can use remaining tool uses directly. When none remain, an AD badge appears only if the corresponding rewarded ad is ready. Rewards are granted only when earned through the ad.

When does the Daily Challenge unlock?

The Daily Challenge on the home screen unlocks when your regular level progress reaches level 18.

How do I change language, sound, and vibration?

Open Settings from the home screen to adjust music, sound effects, voice, and vibration. Choose System, 简体中文, or English for the interface language. System uses Simplified Chinese on a Chinese-language device and English for other system languages.

Do I need an internet connection?

Puzzles run and progress is saved on your device, so you can solve puzzles offline. Ads, app configuration updates, sending feedback, and opening online policy pages need an internet connection.

Where can I manage ad privacy choices?

Ad privacy options appear in Settings when that entry point is required. You can also manage applicable privacy permissions in device settings. Declining personalized ads may still allow non-personalized or limited ads. See the Privacy Policy.

Does my progress sync across devices?

The current version needs no account and has no in-app cloud save or cross-device sync. Progress stays on the device you use. We have no server copy from which to restore it. If something goes wrong, contact support before deleting the app or clearing its data.

How do I delete game data or feedback I have sent?

Clear app data in Android settings, or delete the app and its local data, to remove progress and settings from that device. On iOS, Offload App keeps documents and data; use Delete App to remove those local records. Backups are managed through your backup settings. Deleting the app does not delete feedback already sent. To request access to or deletion of feedback, email us with enough information to locate it, such as when you sent it. See the Privacy Policy.