Pretty cool! I can easily see it spun into a bigger project! With some proper story giving context for the scares, some sound ambience (like maybe really quiet street noise?). The main problem though is that it was over so soon :)
There is one more thing, that I just noticed looking at the screenshots- the light in the room has more of "morning" vibe than "middle of the night". Didn't notice it during playing though, so it's not a big deal.
I'd like to see more of it, keep up the good work!