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WorkCase study

Sunbird

A one-tap flying game on Google Play. Everyone flies the same course each day, and every flight can be replayed exactly.

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1 min

The problem

A daily leaderboard is only fair if everyone flies the same course and every score can be checked. That needs a game whose physics give the same result on every phone, from the same input.

Role

Everything: the game, the backend, the store release and the operations.

Key decisions

  • No framework, no build step. The game is plain JavaScript modules on a 2D canvas, wrapped with Capacitor for Android, so what is tested is exactly what ships.
  • Deterministic replays. A flight is its inputs. The physics carry a version, and changing them means bumping the version and regenerating a corpus of recorded flights that the tests replay.
  • One course a day. Every player in the world flies the same course on the same day, so the leaderboard compares like with like.
  • A small backend. A .NET service on Azure keeps the monthly and all-time leaderboards in Cosmos DB and backs up progress behind a hashed recovery code.

Where it stands

Published on Google Play.