First of all, let me say that I really dig what you've done here. The overall vibe is great, and the gameplay feels good as well. The only thing that stood out to me was the mouse look, which felt a bit drifty at times.
I also really enjoyed the sound design and music. One thing that could perhaps use some attention is the audio mixing, as some sounds felt noticeably louder than others. Even so, the overall audio experience was very enjoyable. I also think the game could benefit from spatial audio, if that's something your engine supports.
Unfortunately, I wasn't able to finish the game because I ran into what might be a bug. At the section where you pull the shelf away to get the code for the gym, I couldn't pick up the code or interact with it in any way, which meant I couldn't open the gym door and progress further. I tried reloading the game, but the issue remained.
Of course, it's possible that I missed something or didn't complete the steps in the correct order. I'm also not particularly experienced with puzzle games, so take that observation with a grain of salt.
Overall, though, I think you have something really great here, and I genuinely enjoyed my time with it.
