I have an Android game built with Unity (you can try it here: https://play.google.com/store/apps/details?id=com.qualwiztech.royalking). Right now the game requires sign-in, but I want to open it up and polish the retention flow. What I need: • “Play as Guest” – Players should be able to jump straight into the game with full functionality, no account creation. Give each guest a unique, device-based ID so their scores feel permanent even if they never sign up. • Global leaderboard entry – Every guest run must post to the existing global leaderboard exactly as a regular user would. If you prefer Google Play Games Services or another backend, that’s fine as long as the result is one seamless, cheat-proof board. • Inactivity push notifications – If a player hasn’t opened the game for a set period (configurable in code), send a gentle push reminding them to come back. I already have a Firebase project; you’re welcome to tie into that, or suggest another reliable solution. Acceptance criteria 1. Guest users can launch, complete matches and see their scores appear on the global leaderboard without manual login. 2. Returning to the game days later still recognises the same guest profile on that device. 3. A push notification fires after X hours of inactivity, is delivered to the device, and opens the game when tapped. The project is self-contained in Unity 2021 LTS, version-controlled on Git. I’ll give you a branch to work on and test-Flight style builds for quick iteration. Let me know your turnaround time and any additional SDKs you expect to integrate so I can approve them upfront.