Unity3D Game Upgrade

I'm seeking a skilled Unity3D developer to upgrade my game project. The specific areas for improvement are currently undecided, but may include graphics and visuals, gameplay mechanics, or user interface enhancements.

Ideal Skills and Experience:
- Proficiency in Unity3D
- Experience with game graphics and visuals
- Strong understanding of gameplay mechanics
- Expertise in user interface design

Please provide a portfolio showcasing relevant work and be open to discussing different upgrade paths.