Unity3D Game Development

I need a Unity3D developer to implement several features for my game. The estimated development work is about 50 hours.

Key Requirements:
- Restart game = start with initial coins
- Consume JSON data
- Wrong input costs coins event
- Add ads to watch for coins
- Email login authentication
- Remember login functionality
- Separate settings from quiz into 2 files
- Ads pop-up
- Offer "Multiply Coins" feature
- Rate & "No Thanks" pop-up
- Quiz answer timeout penalty
- Initialize coins = quiz count * hint penalty
- Show 100% score upon game completion
- Save incorrect answers
- Push updates to GitHub repository: https://github.com/adamelhem/Picture-Quiz-Plus

The game should be compatible with both iOS and Android platforms.

Ideal Skills and Experience:
- Strong proficiency in Unity3D
- Experience with JSON data handling
- Familiarity with implementing ads in Unity games
- Solid knowledge of email authentication integration
- GitHub version control

Please ensure you have all necessary expertise to deliver within the estimated hours.