Very short, but I enjoyed it. Extraordinarily creepy monster!
A few suggestions for improvement:
- There is an area in the last room to the right of the second floor where the character can walk off the visible screen.
- It would have been helpful to give the two keys a different appearance.
- The places where the character can leave the screen by walking down could be more clearly visible.
- The graphics look like pixel art, but with some compression. If intentional, this is a somewhat unusual choice. If not, you may want to review the settings for the imported images. Filter mode should be "Point (no filter)" and Compression should be "None."