Heart Potion Sort

A polished liquid-sort puzzle: play it right here in your browser, or install the Android APK. Pour heart-colored potions between bottles until every bottle holds a single color, then watch each one seal with a heart stopper.

Heart Potion Sort is a complete mobile game built end to end as a portfolio project: game design, art direction, UI, level pipeline, progression and resource systems (lives, undo, daily rewards), audio and release build, tested on real devices.

Gameplay

• 20 levels with a progressive difficulty curve
• Fluid pour animation: the liquid level changes continuously, the stream tracks the surface, and stoppers drop in to seal full bottles
• Undo and a 3-star rating based on move efficiency
• Dead-end detection: the game recognizes unwinnable boards and loops and ends the level instead of letting the player shuffle endlessly
• Retention loop: lives that regenerate every 20 minutes, a limited undo supply, and a daily reward (pick one of six hats, weighted rewards of lives and undos) with a reserve basket for bonus lives
• Onboarding: short contextual hints on the first levels
• Pause menu, separate music and sound toggles, original UI art
• Responsive portrait layout: safe-area aware, adapts to phones, tablets and notches

How to play

In the browser: press Run game above. The game is designed for touch and portrait; with a mouse, click instead of tap. Use the fullscreen button for a bigger view. Progress is saved in your browser.

Credits and workflow

• Merve Çiftci — game design, art direction, UI/UX, QA and release. All visual assets are hand-made. I define requirements, review every build on device and decide what ships.
• Engineering — AI-assisted development. The C# implementation was produced with Claude (Anthropic) under my direction, using iterative specs, code review, refactoring passes and a unit test suite. I treat AI as part of the toolchain and I'm happy to walk through the architecture and the decisions behind it.

Technical overview

• Unity 2022.3 LTS, URP 2D, C#
• Modular architecture: one assembly definition per domain (Core, Puzzle, Levels, Player, Economy, Audio, UI, Bootstrap) with enforced dependency direction
• Separation of concerns: puzzle model and rules are engine-independent C#; views only render state
• Automated tests (EditMode) covering rules, undo, level parsing and validation, lives, daily reward and boosters
• Solver-based outcome evaluation: bounded state-space search classifies boards as solvable, dead end or loop-only
• Data-driven content: JSON level definitions with a validator
• Persistence behind interfaces: local stores today, swappable for a backend
• Mobile performance: 60 FPS target, no per-frame polling or scene scans, buffer reuse, UTC-based timers, IL2CPP build
• Resolution independence: safe-area handling and a board layout that measures the HUD at runtime

Scope and roadmap

Current build: offline, single-player, no ads or purchases.

Planned next: analytics (retention and level-funnel tracking), server-side time for lives and rewards, colorblind-friendly palette, additional levels tuned from play data.