Puzzle Game App Development

I'm looking to create an engaging puzzle game for mobile devices. This app will be aimed at the entertainment sector, utilising the Android Play Store for distribution.

Key requirements:
- Development of a user-friendly, interactive mobile game
- Integration of various levels of difficulty to keep users engaged
- Incorporation of attractive, intuitive graphics and sound effects
- Implementation of in-app purchases or ad-based revenue options

Ideal candidates will have:
- Proven experience in mobile app development, particularly in creating games
- Strong understanding of the Android platform and Play Store requirements
- Ability to create visually appealing, high-quality apps
- Understanding of monetisation strategies for mobile games

Please provide examples of similar projects you have completed in your bid.