This game has a classic DOOM feel to it, down to the graphics. Perfectly fits within the theme, and the wall walk mechanic works really well. I used it multiple times to put myself in more advantageous situations, and when you understand how to gain more speed with it, it becomes super fun!
It feels responsive and quick to play, the sound effects are fitting and the music never felt tiring. Also, I noticed the dynamic music. It was awesome.
The boss fight at the end is super sick. The mechanics of it aren't too tough to grasp, and you're able to get everything you need to keep survivng. The boss itself is imposing, and when you take the elements of the story in consideration, the steps to killing the boss make a lot of sense.
The enemy designs felt weird, which is right up my alley. I had a lot of fun looking for the hidden jams, which were a nice touch to have and gave a huge incentive for exploration. I did notice that the last level before the boss had a route to get you super quick to the end, which I thought was interesting for speedrunning. The sliding mechanic was unexpected but very welcome, and added even more dynamism to the game.
I had a great time with this!