Hey man, I liked your game.
What I do think is that the choices are a bit predictable and that most of the times I only had one to choose from, making the game very linear. I think this kind of game must have a lot more depth to it. But then again, it's a game jam, of course you don't have time for that.
I tried really hard to find the jumpscare you mentioned but didn't find it? I got threeendings, in two of them the guy at the end showed himself. Is that the jumpscare? Maybe.
Overall, I think it's great, just needs more depth.