Wow, you absolutely nailed the inspiration and made it your own, and the hand-drawn aesthetic is just the cherry on top. The gameplay can be quite challenging in some parts (e.g the narrow hallway) but you quickly acclimate thanks to the set spawns, allowing you to memorize and learn the level (what path to take, which enemies to focus on, and how to deal with them).
To really sum it up: I want *more*. This is absolutely one of the best short FPS games on itch I've played in recent memory and its criminal how little attention you've received. I would love to see an expanded version of this game.