Good to see a fellow 3d game in this jam. Loved the chaotic cutscenes. Soviet Rangers are definitely my favorite. You also got a nice variety of gameplay modes, that's really good.
If you are planning on continuing development, here is my feedback: tutorials inside the game explaining controls and goal for each partucular gameplay mode would be nice to have. I got stuck for some time trying to get into the hatch because I didn't know I needed to turn immediately after entering while the game immediately pulls you outside if you just continuously press W. In a fight with flamethrower guy I first thought that I just needed to escape from him and spent minutes searching for the exit.
I know you are imitating PS1-era games, but oh god the scenes with static camera. It can be really annoying trying to move your character with it when you're already used to usual 3rd person camera controls from modern games (this applies to Dreams of Leaves as well). This is just my personal opinion though. Also it is diffucult to hit people with a pistol using mouse and keyboard since the game only allows to fire in 8 directions, it seems.
Overall great game, I looked forward to it since I liked Dreams of Leaves and it's narrative through cutscenes and it seems that you managed to make more content this time, very nice.