🧠 Difficulty Setting

Users can choose their preferred difficulty level, which directly affects the types of questions they receive in the game.

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🎯 Purpose

Allow users to play at a level that suits their skills:

• SIMPLE – For beginners or kids.
• CHALLENGING – For advanced learners looking for tough problems.

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🧑‍🏫 Available Levels

Defined in the Difficulty enum:

• SIMPLE
• EASY
• MEDIUM
• HARD
• CHALLENGING

These levels can be expanded or renamed as needed.

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🧠 How It Works

1. When the user selects a level, it’s saved using:

```kotlin DifficultyPreferences.setDifficulty(context, level) ````

1. To retrieve the current level anywhere in the app:

kotlin val level = DifficultyPreferences.getDifficulty(context)

1. Game fragments (like Tap Mode, Shake Mode) use this level to load questions dynamically based on difficulty.

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🔁 Persistence

The selected difficulty is stored in SharedPreferences under this key:

pref_difficulty_level

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