Nice doom-like, with a huge nostalgic vibe to it =)! The controls are very smooth and the action is great, it really felt good to cruise through the levels! I'm not sure about the relationship with the theme, but I had a great time, so that's wha is important ^^.
I would have liked a checkpoint system, retrying from the very beginning after a death was not very engaging unfortunally ^^'.
Overall, a solid game, congratulations =)