Ah, adrenaline spike! Interesting take to focus on the player's comfort instead of the game protagonist. However, this makes it fit the theme less in my opinion.
Protecting the crystal was an ok goal, destroying the enemies was more fun, though the shooting did not feel entirely right as of yet.
Did you include the actual DOOM 2016 OST in this? I assume do not have the right to use it, so I'd replace it with music that you can legally use after the jam.