The atmosphere and overall concept are fantastic.
That said, the combat feels very strange to me.
I feel that the enemies need better balancing, and there should be more audio cues for attacks, movements, and enemy actions in general. Clear sound indicators would add a lot to the combat experience, allowing players to feel and hear what enemies around them are doing.
This becomes especially important when fighting multiple enemies at once. Good audio feedback would help players react to threats they cannot immediately see, creating a more dynamic and engaging combat system. Without those cues, encounters with several enemies can feel unfairly difficult, frustrating, or simply annoying rather than challenging in a fun way.
I think it would be much better if the "Scan" ability revealed those weak points, making it feel like you're studying and learning an enemy's weaknesses before engaging in combat.
Another issue is that it's extremely frustrating when enemies parry every attack while they're actively fighting you. It feels awful in practice. Even when hitting an enemy outside of a weak point, attacks should at least push them back slightly or stagger them a little.
The math-based puzzles are not very good. I had no trouble solving them, but they don't make for interesting puzzles. Maybe consider replacing them with hidden words or clues scattered around the map that act as passwords for logging into terminals.
Speaking of the terminals, I absolutely love that system. It felt very immersive and added a lot to the experience.
The parkour feels quite frustrating. For this project, I would highly recommend studying and taking inspiration from Lorn's Lure.
This project has the potential to become a true indie gem that people all across the indie gaming community will be talking about.