Bunker - Real-Time Browser Party Game

This project is a web adaptation of the "Bunker" party game that I personally enjoy. I built it as a lightweight, real-time multiplayer experience playable directly in the browser. The main goal was to reproduce the original game mechanics online while exploring micro-backend development in Java for the first time using Spark. I also focused heavily on engineering practices by integrating SonarCloud for automated code quality analysis, adding JaCoCo for test coverage reporting, and using Jib for streamlined Docker image builds. Additional tooling such as the Spotify formatting/check plugin helped enforce consistent code style. Real-time gameplay is powered by WebSockets to keep all players synchronized with minimal latency, without requiring authentication or a persistent database.

Key Features & Details

• Backend: Spark Java micro-backend + WebSockets (first experience)
• Frontend: Vanilla JS + Tailwind CSS
• Real-time: WebSocket-based state synchronization for multiplayer sessions
• Code quality: SonarCloud integration for static analysis and quality gates
• Test coverage: JaCoCo reports published into SonarCloud
• Containerization: Docker image builds using Jib (no Dockerfile needed)
• Code style: Spotify fmt/check plugin for consistent formatting and validation
• No database: Rooms and game sessions stored in memory
• Zero auth: Players join instantly by entering a name

graph TD
    A[Player 1] <-->|WebSocket| B(Spark Java Backend)
    C[Player 2] <-->|WebSocket| B
    B -->|Game State| D{In-Memory Storage}

Bonus: Beyond the technical challenge, I discovered that this is a great game to play with friends! We still enjoy playing it together from time to time.