The game is awesome, especially the atmosphere and the visuals. I really liked your interpretation of the theme with the experiment and the elevator - it was a cool idea.
The enemies have a nice variety, though I do wish there were even more monster types to keep things fresh. Overall, it was a really fun game to play.
I also noticed there isn't a web build. My game is Windows-only too - I decided leave out the web build and focus on Windows. After seeing how many people prefer playing in the browser, I guess I need to learn how to make a game that works well on both web and Windows.
Great job!