This is a really cool game! The game definitely gave me the creeps, and I got pretty scared even just when the red eyes occasionally showed up, really well done! I loved the overall aura and the story is interesting. I really loved being able to explore the environment at first, it was a really nice addition.
As you mentioned there were a handful of bugs, but they led to some pretty interesting thoughts! One that I did twice was getting myself closed out of the sliding gates (once for the elevator, once for the maze). I have a bad habit of backtracking a lot in games, but if you update the game that could be a gameplay opportunity--like a bad ending if you get yourself locked out (I feel like one of the Stanley Parable's endings was like this?). Another thing that felt like a bug (I wasn't sure if it was intentional or not) was being able to see some of the squares behind the black cover in front of the TV in the memory game if you look at it from a certain angle, but honestly it felt really rewarding to notice it! If it's not a bug (or honestly, either way)--well done! I almost could see the puzzles all being nearly impossible except for some visual trick due to the serum giving you better "perception." Finally, I also had the ending bug where it told me to go to my cell twice. When I was playing though, I thought to myself "maybe this isn't a bug" and realized my room had a number, so I went back up the elevator and I went back to the second lab thinking that going through corresponding door in lab 2 would complete the last task! I know it's just a bug now, but honestly that could be a really cool final puzzle! These are just some thoughts if you're thinking of updating the game or reusing some concepts--sometimes bugs give you the opportunity to turn lemons into lemonade so to say :)
Overall, great job on the game!