Gunplay felt satisfying. Bosses felt well balanced too, always had just enough ammo to complete them. I liked the horror twist/dodging enemies in the second half of the game, added some nice variety.
Graphics fit the game style, and the music has some punch to it. Your choice of jump SFX was amusing too. Overall, really nailed the Retro-Goldeneye shooter vibes.
For improvements, I'd say that weapons should be selectable using the scroll wheel rather than just the [TAB] key. Maybe add another weapon in for some variety (e.g. a sniper).
Cool submission. Congratulations!