Light Up Pop!

Light Up Pop! is a free logic puzzle where you place light bulbs on the white squares of a board to illuminate the entire board. It follows the classic rules of light bulb placement puzzles.

■ Features

・Place light bulbs to illuminate all squares
Tapping a white square places a light bulb, illuminating that row and column to the black squares or edges. Illuminating all white squares is one of the clearing conditions.

・Light bulbs cannot illuminate each other
Placing two light bulbs in the same row or column where their light hits each other is prohibited. If there is a contradiction, the corresponding light bulb will be subtly highlighted.

・Numbered squares provide hints
Black squares with numbers indicate the number of light bulbs adjacent to them (above, below, left, and right). Place the light bulbs to perfectly match the numbers.

・Every puzzle has a unique solution
No guesswork is required. All puzzles are automatically generated and guaranteed to have only one solution using logic alone.

・Intuitive tap-based operation
Each time you tap a white square, it cycles through "empty → light bulb → × mark → empty". The "x" mark indicates a "do not place here" memo.

* Get a hint if you get stuck

You'll be given a hint showing you one square you can immediately place. Undoing is free and unlimited.

* Four difficulty levels

Choose your difficulty level from easy to advanced, based on the board size and density of black squares.

* Completely free and playable offline

No internet connection required. Enjoy at your own pace, anywhere, even during your commute. There are no in-app purchases.

* Auto-save to continue anytime

Your progress is automatically saved even when you close the app, allowing you to resume from where you left off the next time you launch it.


■ How to Play

1. Tap a white square to place a light bulb.
2. Illuminate all white squares with the light bulbs.
3. Clear the puzzle if no light bulbs illuminate each other and the number of adjacent light bulbs matches exactly.
4. If you get stuck, use hints or undo to start over.

■ Recommended for:

* Those who like Sudoku or logic puzzles.
* Those who want to experience the satisfaction of deriving the unique correct solution through logic.
* Those looking for brain training in their spare time.
* Those looking for a game that can be played offline and does not require payment.

■ About Ads

This app is free to use. Ads (Google AdMob) will be displayed. There are no in-app purchases.