Fluid Simulation – Unity Game Source Code (also known as Happy Cup) is a fun and relaxing physics-based puzzle game where players draw lines to guide water into a happy cup.
Built with Unity 6 or newer, this complete 2D project combines smart physics, fluid simulation, and creativity, offering endless fun for puzzle lovers.
Blending creativity with problem-solving, the game encourages players to experiment with different drawing strategies while interacting with realistic water behavior. Every level presents a new challenge that requires observation, planning, and precise line placement.
Unlike traditional puzzle games, Fluid Simulation allows players to create their own solutions by drawing paths and guiding water toward the goal. The realistic fluid movement makes every level feel dynamic and rewarding, while the happy cup character adds charm and personality to the experience.
As players progress, puzzles become more challenging and encourage creative thinking, making the gameplay both relaxing and engaging.
🧠 Physics-Based Puzzle Gameplay – Draw creative paths to guide the water perfectly into the cup.
😄 Cute Happy Cup Character – The cup smiles when filled and reacts emotionally to success or failure.
✏️ Draw Lines Freely – Realistic physics and fluid motion.
🎨 Minimal & Clean Design – Simple yet addictive visuals with smooth animations.
🔄 Multiple Levels – Increasingly challenging puzzles to solve.
⚙️ Lightweight & Optimized – Runs smoothly on all Android and iOS devices.
🎵 Soothing Sound Effects – Relaxing experience for players.
🔧 Fully Customizable – Replace cup designs, levels, and UI easily.
This project is ideal for developers interested in casual puzzle games, educational experiences, physics-based mechanics, or hyper-casual mobile publishing. The gameplay concept is easy to understand, making it appealing to a broad audience of players.
✅ 100% ready-to-publish Unity game
✅ Realistic physics simulation with line drawing mechanics
✅ Beginner-friendly code structure
✅ Ideal for casual & puzzle categories
✅ High retention and viral potential
Unity Version: 6 or newer
Android/iOS SDK
Basic Unity knowledge
Open project in Unity 6 or newer and review the included gameplay systems, assets, and level structure.
Customize assets & branding according to your own visual style or publishing requirements. The project is designed to make customization simple and efficient.
After testing and final adjustments, build for Android or iOS and upload the finished game to the Play Store or App Store.
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