Nice little entry
I really like the weapon sprites, the sword slash feels quite satisfying, and i like that the gun while not offering multiple weapons per say, has an upgrade system where it changes your shots.
Also impressive that this is made in a doom sourceport :O
especially since there seems to be a few new mechanics you made like the switch code thing and the floating platform which i have no idea how this could be possible with that engine
Really cool game, congrats :)