First-Person PC Adventure Game

I’m looking to have a compact first-person tropical island survival adventure game built for PC. The scope is intentionally small: think one self-contained environment, a short narrative thread, and a handful of interactive set-pieces that let the player explore, discover new things. No need for a ending, mostly want to be like a simulation survival in the pacific on an island.

Here’s what I need:
• A Windows-ready build with standard WASD / mouse controls and basic settings (resolution, volume).
• One polished level that showcases simple exploration, item interaction, and a trigger-based event or two to move the story forward.
• Lightweight art and audio assets are fine—placeholders are acceptable as long as they communicate the mechanics and flow.
• Clean, well-commented source project (Unity or Unreal are both fine) so I can iterate later.

Acceptance criteria:
1. The player can launch the game, move freely, interact with at least three objects, and complete the adventure in roughly 5–10 minutes.
2. No critical errors or crashes on a mid-range PC.
3. Final delivery includes the executable, all source files, and a brief read-me outlining controls, build steps, and asset credits.

If this sounds manageable, let me know your preferred engine and timeline, and we can get started right away.