Nice entry!
I quite liked the aesthetic and the premise, feel like there's a lot of opportunity to expand it further.
The hidden tunnel effect was very cool. The graphics overall were fairly crisp, good use of lighting and particles! Only downside to me was that it was unclear what exactly the decorative objects were - they have names in code like "icedFountain", "controlPanel", "deadHeater", "engineHolder" and the like, but they didn't associate with anything for me (maybe due to perspective). Nice touch with the parallax effect on arches.
The sound design was great, it perhaps contributed the most towards building the atmosphere!
I felt the game could use more variety or challenge. Once you figure out what each item does, and what combinations can be crafted (both don't take long), the game boils down to slowly wandering the halls, applying correct item to the obstacle, or backtracking if you don't have the needed item. Maybe it would've helped if the game had enemies, or more crafting combinations, or more memorable locations (all tunnels look kinda same), don't know.
There's a broken .lnk file in your game archive that points to a file that only exists on your PC, might want to remove it for future releases.