The concept of an alien imitating humans to infiltrate and destroy a company is interesting, but there are some issues with the execution. The biggest one in my opinion is you can't really see where you're going; as mentioned in many other comments going through doors is blind and the camera trails behind rather than looking ahead. I think this could be improved by changing the perspective; the game is 2D but has a virtual third axis going through the doors, while the ability to view other floors seems to have minimal utility. A top-down perspective would let you view both relevant axes instead.
There's also a balancing issue in terms of where the difficulty is located. For me, the only two points of difficulty were walking through doors and immediately dying, and not knowing whether I had subverted all the employees, neither of which were engaging to me. The system of "Make sure you don't overuse one of the strategies!" seemed interesting, but the strategies had no differences other than which key you press. If the options cost resources you needed to manage, or gave different rewards you needed to prioritize, then the choice could be meaningful.