Unreasonably solid execution.
I really like it! I think it captures the feeling of flunking up a stealth mission and having to desperately escape the pursuit pretty well. I like how the game despite being more akin to a top-down shooter uses stealth mechanics, with enemies quickly forgetting where you were, being able to avoid their line of sight, it took a while for me to get past the aesthetics and understand that this is still a stealth game.
Speaking of the aesthetics, the styalisation is really solid! I like the simplistic red-and-white clean sprites with blood splatters, I think it has a lot of character and appeal due to the amount of well-detailed animation frames.
Now for the sparse criticisms:
The game isn't as easy to "get" as you assumed. It took me a solid 3 minutes to understand that the black.. papers? Folders? Rocks? Are the objectives. Bullets are tiny and WHITE, on WHITE FLOORS, they blend in! Vests are slightly better but still quite hard to notice in a hectic game. I suggest you either add a simple info screen at the start or make them pop out more by animating them slightly or making them outline in red if you desperately need them.
the game is also somewhat buggy. I had clipped through walls, had enemies do so, had the machine gun dude stick his gun through a wall to shoot me once alerted, and sometimes the bullet pickups seemingly did not register.
UPDATE: Most of my criticisms have been addressed by the developer!