This is great! A tad rough around a lot of the edges but I enjoyed my time with it, and did indeed jump a handful of times before I made it to the end.
I liked the variety of dealing with the enemy types, but I must say the pacing of it could have been handled more delicately to make horror gradually unveil. I love the journal notes but receiving them all immediately removes any potential suspense, maybe drip feeding them along the way while gradually unveiling the enemy types could be more effective. In the same way, seeing the lumber but not being able to pick it up, even after reading that you need to pick it up, feels a little too game-y. The sound design works great but is noticeably absent from some parts, like removing the mimics.
One major complaint is the length of the game over, when a lot of the time you barely see what killed you, it often seemed to take ages to finally die and get the black screen, its a neat little camera movement/animation, but feels like a drag waiting for it to end so many times.
Sorry to list so many critical things but it is because I did really enjoy the game! Great work within the constraints of the jam!