Add README.md with project overview, architecture, features, and setup instructions

README.md

@@ -0,0 +1,103 @@
+# Project Elf (Klabutong Remake)
+
+A modern Unity recreation of the classic 2003 indie game **Klabutong** by Free Lunch Design. This project aims to replicate the "catch the falling presents" gameplay while strictly adhering to **Clean Architecture** principles and **Clean Code** practices.
+
+The project is built to be modular, testable, and easily expandable (e.g., for future mobile ports) by decoupling business logic from the Unity Engine.
+
+---
+
+## 🏗 Architecture
+
+This project follows a strict **Separation of Concerns** using a layered architecture. The codebase is divided into four distinct layers:
+
+
+### 1. Core (Domain Layer)
+* **Path:** `Scripts/Core`
+* **Responsibility:** Pure C# business logic. **No Unity dependencies allowed.**
+* **Components:**
+    * **Systems:** `ScoreSystem`, `LivesSystem`, and `TimeAttackSystem` manage game rules independently.
+    * **GameEvents:** A static Event Bus that acts as the central nervous system, allowing decoupled communication between systems and the UI.
+    * **GameMode:** Enum defining Arcade vs. Time Attack modes.
+
+### 2. Abstractions (Interfaces)
+* **Path:** `Scripts/Abstractions`
+* **Responsibility:** Defines contracts for external dependencies, allowing for easy swapping (e.g., swapping Mouse Input for Touch Input).
+* **Key Interfaces:**
+    * `IInputService`: Contracts for movement and interaction.
+    * `IPersistenceService`: Contracts for saving/loading high scores.
+
+### 3. Infrastructure (Data & Input)
+* **Path:** `Scripts/Infrastructure`
+* **Responsibility:** Concrete implementations of the Abstractions layer.
+* **Components:**
+    * `PlayerOneInput`: Implements Unity's **New Input System**.
+    * `PlayerPrefsPersistence`: Handles saving data using Unity's `PlayerPrefs`.
+
+### 4. Presentation (View Layer)
+* **Path:** `Scripts/Presentation`
+* **Responsibility:** Unity `MonoBehaviours` that handle rendering, physics, and UI. They simply "listen" to the Core layer and render the result.
+* **Components:**
+    * `GameBootstrap`: The entry point. It initializes the Systems and injects dependencies.
+    * `ElfController`: Handles the visual movement and cane rotation logic.
+    * `PresentSpawner`: Manages object pooling for performance.
+    * `GameHud`: Updates the UI based on `GameEvents`.
+
+---
+
+## Features
+
+* **Two Game Modes:**
+    * **Arcade:** Classic gameplay with 3 lives.
+    * **Time Attack:** Race against the clock with time penalties for missed presents.
+* **Local Multiplayer:** Support for 2 players (Co-op).
+* **Performance:** Uses an **Object Pool** (`PresentSpawner`) to recycle "Present" objects instead of instantiating/destroying them, ensuring smooth garbage collection performance.
+* **Persistence:** Automatically saves and loads high scores based on the selected game mode.
+
+---
+
+## Controls & Mechanics
+
+The core mechanic involves a **physics-based candy cane**:
+
+* **Move Right:** The cane tilts clockwise (`\`), raising the left side to catch presents falling from the left.
+* **Move Left:** The cane tilts counter-clockwise (`/`), raising the right side to catch presents falling from the right.
+* **Stop:** The cane returns to a neutral horizontal position.
+
+---
+
+## Getting Started
+
+### Prerequisites
+* **Unity 6**
+
+### Setup
+1.  Open the project in Unity.
+2.  Open the main scene.
+3.  Ensure the `GameBootstrap` object has the following references assigned in the Inspector:
+    * `Elf Prefab`
+    * `Spawn P1` / `Spawn P2` (Transforms)
+    * `Spawner` (Reference to the PresentSpawner object).
+4.  Ensure the `GameHud` object has references to your TextMeshPro UI elements.
+5.  Press **Play**.
+
+---
+
+## Configuration
+
+You can tweak the game settings directly on the `GameBootstrap` GameObject:
+
+* **Start Value:** Number of lives (Arcade) or starting seconds (Time Attack).
+* **Two Player Mode:** Check this box to spawn a second elf.
+* **Mode:** Switch between `Arcade` and `TimeAttack` via the dropdown.
+
+---
+
+## TODO / Known Issues
+
+* **Player 2 Input:** The class `PlayerTwoInput` currently throws `NotImplementedException`. Logic needs to be added to map specific keys (e.g., Arrow Keys) to the `IInputService`.
+* **Difficulty Scaling:** The spawner has a placeholder comment for difficulty scaling which needs to be implemented.
+* **GFX&SFX**
+
+---
+
+*Remake created for the love of retro gaming.*