Noo, the door won't open!! This was awesome! :D As a platformer it was challenging, but having frequent checkpoints put it just at the right difficulty. The art style was great, the music and sounds also (that breathing..), it created a tense atmosphere.
What I really liked though are the small details, like short "cutscenes", how it had a bit of story and it made sense, how the level was made so going back at the end would feel just as smooth as forward, all these nuances that people might not notice, but gives a better "feel" to them is what's important! Well done! 👍