I already have the full Unity source code for a casual puzzle game and simply need a developer who can put everything together so it runs smoothly on both iOS and Android. All art, levels, and core gameplay are done; the task is purely about integration and build preparation. What I expect you to handle • Open the existing Unity project, resolve any package or version conflicts, and make sure it compiles without errors. • Configure platform-specific settings (icons, splash screens, signing, Gradle/Xcode, etc.) so the game installs and launches on current iOS and Android devices. • Enable basic mobile essentials that are already stubbed in the code—player prefs for saved progress, sound toggles, and standard back-button handling. • Produce a release-ready Android APK/AAB and an Xcode project (or TestFlight build) for iOS, along with a quick hand-over document that explains any changes you made. Acceptance criteria – Game loads, plays, and exits without crashes on at least one recent iPhone and one recent Android phone. – All existing puzzle levels and UI screens work exactly as in the editor build. – Final builds are free of console errors and meet store size limits. If you’re comfortable working in Unity (2021 LTS or newer preferred) and can turn around clean mobile builds quickly, let’s get started right away.