777 Luef Tsgels

"### Basic Rules
1. **Click on Card**: Click on a card in the game area to move it to the bottom tray
2. **Match 3 mechanism**: When there are 3 cards with the same pattern in the tray, these cards will automatically be eliminated
3. **Victory Condition**: Eliminate all cards in the game area to win
4. **Failure Condition**: The game fails when the tray is full and match 3 cannot be formed.

### Game mechanics
- **Card Blocking**: The upper card will block the lower card, and only the unblocked card can be clicked
- **Smart Detection**: The game will automatically detect uncompleteable situations and end early
- **Tool Assistance**: Provides auxiliary tools such as shuffling, undoing, and prompting

## ?? Game Mode

### 1. Classic Mode
- **Number of cards**: 20-30 cards
- **Difficulty Level**: Moderate
- **Suitable for**: novice players

### 2. Endless Mode
- **Features**: Difficulty increases step by step
- **Challenging**: Suitable for players who are looking for a challenge
- **Continuous Game**: Multiple levels can be played continuously

### 3. Hard Mode
- **Feature**: Dense card stacking
- **Difficulty Level**: High
- **Suitable for**: Experienced players

### 4. Daily Challenge
- **FEATURE**: New puzzles updated daily
- **UNIQUENESS**: Different challenges every day
- **Social**: Compare results with friends

## ??️ Auxiliary tools

### Shuffle
- **FEATURE**: Rearrange cards in the game area
- **Restriction**: Cannot be used when there are less than 2 remaining cards.
- **Sound Effect**: Special sound effect feedback when used

### Undo
- **Function**: Undo the last move operation
- **Limitation**: Cannot be used without undoable operations
- **Strategy**: Recommended to be used at critical moments

### Hint
- **Function**: Highlight cards that can form a match-3
- **Smart**: Prioritize cards that can form match-3
- **LIMITATION**: Cannot be used when no moves are available"