I first expected it to be a simple shitpost, but it was a real crawler. I really like the work you did on textures, and the voices and the fact they would stop if you change a line. The music that change in function of your health bar was really cool as well. The controls didn't feel as snappy as I wanted to be, and having the mouse look plus rotating plus strafing on the grid felt a bit weird at time. Allowed me to attack in diagonals tho, so that was interesting.
Really nice work overall!