Great foundation for a full game.
The art style is simple. However, I found that the sound effects and music coupled with the general darkness made it an engaging experience. I found it cool that despite being the monster I still had to run and hide from detective to make sure I did a good jump scare.
For improvements, maybe work on the controls a bit. The mouse felt a bit jerky. Perhaps add a sensitivity slider. Also, I noticed that there was a reflection of the players light source on some surfaces. Maybe replace the singular light source with two light sources to make it look like glowing monster eyes?
I would really recommend working on this game. Maybe add some more levels and different ways to increase your scare score.
Excellent Submission!