All math problems, scoring logic, and screen-by-screen mock-ups are ready; the remaining step is transforming them into a smooth Android game and pushing it live on Google Play. The build can be in Java, Kotlin, Flutter, unity—whichever stack lets gameplay feel most responsive while keeping future updates straightforward. The visuals only need to replicate my mock-ups faithfully; you are free to optimise under the hood for performance and reduced APK size. Core functionality to implement: • Google Play Games Services leaderboard so students can compare scores. • Secure, device-synced progress tracking that survives reinstalls. • Simple multiplayer (turn-based or real-time) for puzzle races. Additional needs: • Automatic language switch based on the player’s device locale, with an option to lock a country language from settings. • Clean analytics hooks so I can review level-by-level accuracy. • A signed release build uploaded and approved in my Google Play Console, including icon, screenshots, and privacy policy I will supply. Deliverables 1. Complete, well-commented source code and build files. 2. Production APK/AAB published to Google Play and reachable via public link. 3. One-page hand-off guide covering how to update questions or add new languages. I already provide every graphic asset, the full question bank, and the game flow in Figma. The project is finished when the listing is live and installs run without crashes on current Android versions.