I really like what you did with the modeling. The start menu and the exploration segments look great.
The jumps between the 3D models and the photos are a bit jarring, though - have you maybe considered using your 3D models to show them off from different angles, similar to what you have with the photos? That way the style of the game could be kept more consistent and I think the overall presentation could benefit from that.
The GUI and writing itself could probably use more work since it didn't really hold my interest as much as the atmosphere of the game itself did.
Overall this seems like a promising project nevertheless, and I'm looking forward to seeing how you develop it further. Kudos! :)