Really nice game, reminded me of old dos games which brings back some good memories. Though i honestly almost needed a tutorial to pass the first door lol, took me a while to understand where i needed to go. Nice touch that you are only hurt when colliding with enemies that are attacking, not walking around.
I will say that the enemies were kinda hard, they attack too fast sometimes (especially the ones with guns) and there isnt much warning when they do. sometimes i also think the player moves too fast not giving much time for reaction time and makes platforming a bit hard in some spots, combining that with small platforms and enemies on top resulted in some deaths for me lol.
But i really enjoyed the game even though it feels a bit hard for me to finish it, and like i said love the dos style game you went with, the music also fitted perfectly.