Very nice entry, a great mood, and atmosphere. I also struggle with lengthy first-person platform puzzles, but I persevered and got to the end!
The jumping part wasn't exactly hard, but it required concentration and patience. It becomes very stressful the further you get, and restarting from scratch gets tedious. It's just my personal opinion but I find jumping puzzles more palatable in short doses, 6-8 jumps then a checkpoint. I was a little disappointed that I didn't find the room with the uzi as another player mentioned!
I loved the game overall! Great work!