Greetings from Germany. I enjoyed playing your game, the jumpscare really got me. I also got scared collecting the keys and opening the doors because the sound was really loud.
Maybe you could work on the sounds. I had the impression that the background music was way to quiet compared to the sound effects of the game. I had to turn my volume up to hear everything from the music and that's why I really got scared everytime I collected a key or opened a door. But all in all it was a fun experience playing your game even if it was so short. Can't wait to see more. :)