Thanks for playing!
The escape room aspect is only part of what I hope to have for the final game, but I'm glad someone whose not typically a fan enjoyed it. I was hoping the atmosphere would come through all the obvious prototype-y aspects, and I'm happy to hear that was the case for you.
Also good to hear the controls worked out for you, I'll be making some changes so they're less clunky and are modifiable in the settings menu in the next version. The popups were the least intrusive way I could think of to implement a tutorial. Ideally I would be able to design an "invisible" tutorial in the vein of half-life with minimal control prompts, but we'll see how future development goes.
The UI is literally default unity stuff for 90% of it. It's not the prettiest or unique, but it got the job done and so far hasn't been confusing for players. My major concern for the prototype was readability and just making the UI work intuitively. A UI upgrade is definitely coming down the pipe, I'll be working on some smaller projects in between now and the next release for Sub Mortis, so I'll be using those projects to up my UI game.
Thanks for the feedback!