Slenderman-style Maze Game Development

I'm looking for an experienced web game developer to create a Slenderman-like maze game that can easily be embedded in a webpage. The game should feature simple graphics, with watermarked models.

Key Requirements:
- First-person perspective
- Collect 8 custom 3D models as collectibles
- An avocado serves as the enemy
- Maze walls should have text decoration
- At the end of the game, players receive Steam keys
- All text decorations, collectibles, and Steam keys must be customizable via JSON
- The game should be initiated through JS code, without a menu

Ideal Skills:
- Proficiency in game development
- Experience with JSON for customization
- Strong knowledge of JavaScript for game integration
- Ability to create simple yet engaging first-person maze games

Please include any relevant portfolio pieces in your bids.