What a fun and chaotic game! The simplicity of the story, driving force, level design, art, and gameplay all come together to make a simple, fun game.
I really enjoyed the art and AI design of the enemies; they were easily recognizable and easy to shoot, their health was just right, and the danger they posed to the player was perfectly balanced. It was clear how much damage I was taking and giving, and that made the gameplay very fun. The level design also helped give the combat intensity and excitement, and it really made me feel like I was progressing somewhere, even if I was always surrounded by bricks. The tutorial was also easy to understand and worked well with the simplicity of everything else, making it feel very natural to enter the game afterwards.
The "game over isn't the end" theme is used really well here, all of the power-ups are fun to use with my favorite being the speed-up one. I wish there was a way to know when you've acquired a new after-death powerup, like if it dropped from the enemy that killed you, but that's something to address with more time on development.
I will say that once I started dual wielding I would get confused about which mouse button shoots which gun. In all of the CODs I play, LMB shoots the left gun and RMB shoots the right, while in this game it's inverted. That part tripped me up due to built-in habits, so I understand if it's a me-thing. Besides that, the bullet damage, spread, and cooldown felt very satisfying and it only needs minor details like audio/visual cues for the cooldown in order to be absolutely perfect.
And lastly, the story was fun; it reminded me a lot of Doom with the serious radio partner and the indifferent player. It was nice being given hints about the upcoming level (yay, new guns!) and it made me excited to play them. And the ending was very goofy and almost made me wish there was a boss fight. It's a very satisfying ending despite the abruptness of it, so great job!
Overall, nothing to complain about and a lot to enjoy, so nice job!