Hello Sir,
It's exciting that you are looking to develop puzzle game on android platform with login authentication.
I have read your requirements, With 3 years of experience in Android App Development, I Having Robust Knowledge of Firebase Modules, Crashlytics Integration, In-App Purchase integration, Payment Gateway Integration, Map Integration.
I would be happy to discuss your projects needs and how I can help you meet them
I look forward to talking to you!
Vikram P.