Shikaku-Style Puzzle / Mobile
built through systems & delivery.
Solo Unity Developer / Personal Project / 2025 - Present
A polished dark-themed Shikaku-style Unity puzzle game with satisfying animations, daily challenges, achievements, player profiles, and Firebase-powered daily or per-level leaderboards.
Expanded a clean logic puzzle core into a competitive mobile experience with live player identity, achievement tracking, rewards, and real-time Firebase-backed rankings.
2025 - Present
Solo Unity Developer
Personal Project
Hierarchical Firebase RTDB leaderboard data keyed by date or level ID with top-score queries and atomic updates
Case study overview
Built Shikaku-style grid solving where each selected rectangle contains one number and matches that number's area.
Implemented daily puzzles with reward loops, dedicated daily leaderboards, per-level rankings, achievements, and profile display-name management.
Optimized mobile input, Firebase reads and writes, DOTween lifecycle cleanup, loading states, tab transitions, and game-result submission flows.
Responsibilities
Puzzle interaction, daily challenge flow, achievement tracking, and mobile-first UI polish
DailyLeaderboardService, LevelLeaderboardService, FirebaseGameResultService, and profile update flows
Firebase authentication, real-time leaderboard structure, username validation, and historical leaderboard name propagation
Technical work
Hierarchical Firebase RTDB leaderboard data keyed by date or level ID with top-score queries and atomic updates
Case-insensitive username registry with validated name changes that cascade to past leaderboard entries
DOTween SetLink and OnDestroy cleanup patterns to prevent delayed callbacks from touching destroyed UI components
Challenges
Making drag and swipe puzzle boundary selection feel consistent across screens with very different pixel densities
Reducing leaderboard and progress sync network load while keeping rankings and profile data responsive
Maintaining premium-feeling dark UI transitions while avoiding animation lifecycle crashes on mobile
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