I enjoyed playing your game, so far my highscore is 12700 (Difficulty ranking 13). I think the simple mechanics along with the level design allows for a good replayability. From my experience as a player, I could feel a sense of mastery the more I played, building a library of possibles paths, strategies, and so on. I would like having a short platform in the middle, connecting a litte bit more the left side with the right one (you can jump from right to left without touching the ground, but not otherwise).
I found a little bit weird the double jump at the beginning, since we're not able to jump on the middle of the air. I'll call it a short/regular jump and a long jump instead, many games have this mechanic, but they usually use another kind of input (not double tapping the spacebar, but basing the jump distance in the amount of time you press the button before releasing)
The music is pleasing. I couldn't tell if ther was a sfx for closing doors. For clarity, I would separate the current points and the game over countdown. The countdown could be some time of bar, or clock-like graphic. And alert the player the game is about to end, intensifing the nightmare visuals, or having the screen pulsating.
I didn't expect the pillow animation, it feels good and smooth. I liked both 2D and 3D art, they still have room to be more integrated.
Overall, excellent idea and execution ♥