Game hard locks when you die. Took me a bit to figure this out because one of the bot types kept sneaking up from behind and killing me. I thought the game was just broken. I got to the boss but did not beat him. Theme seemed a little forced but the game was alright. I didn't know I could reload until a few play throughs (its not called out on the page where you list the controls)
I think with a bit more content this would be fun. Neat Doom style shooter.
Keep it up