Create README.md

README.md

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+<div align="center">
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+# 🐸 Frogger3D
+
+![Godot Badge](https://img.shields.io/badge/godot-4.2-blue?logo=Godot-Engine&logoColor=white)
+![license](https://img.shields.io/badge/license-MIT-green?logo=open-source-initiative&logoColor=white)
+
+A [frogger](https://en.wikipedia.org/wiki/Frogger), made with [Godot Engine](https://godotengine.org/).
+
+<a href="https://github.com/mechanicalflower/Frogger3D/releases/" target="_blank"><img src="public/publishing/store/github.webp" alt="Download on Github" height="40px" ></a>
+
+</div>
+
+## Installation
+
+### From a release
+
+Released binaries are available
+on the Github repository, in the release section.
+
+Download the zip archive, accordingly to your OS, and unzip it.
+
+- **Windows**: Double click on `Marble.exe`.
+- **MacOS**: Double click on `Marble.app`.
+- **Linux**: In a terminal, run `./Marble.x86_64`.
+
+### From source
+
+> [!IMPORTANT]
+> For this installation, you need to have
+> the Godot Editor installed.
+
+Clone the source locally:
+```
+git clone https://github.com/MechanicalFlower/Marble.git
+```
+
+You need to install addons first:
+```
+godot --headless --script plug.gd install
+```
+
+And simply run the game as any Godot project:
+```
+godot
+```
+
+## Development
+
+The project use:
+- [`just`](https://just.systems/man/en/) as command runner,
+- [`pre-commit`](https://pre-commit.com/) to run formatters, this requires [Python 3](https://docs.python.org/3/).
+
+> [!IMPORTANT]
+> Actually, `just` recipes only support Linux.
+
+To check all available recipes, run:
+```
+just
+```
+
+To run formatters:
+```
+just fmt
+```
+
+To install, and run the game:
+```
+just install-addons
+just godot
+```
+
+> [!TIP]
+> In `just` recipes, the Godot Editor is installed
+> automatically. This ensure that you
+> use the right version of the engine.