Fantastic premise and terrifyingly made!
As a person who absolutely despises anything that can crawl on surfaces they shouldn't be able to, I got shivers down my spine any time I heard IT somewhere close by. I also found the movement to be very well executed and satisfying while having a really high skill ceiling and the occasional dialogue that could be found also had me interested in the game's story.
Overall, an amazingly tense and short experience, I got this game while it was free, but it is easily worth the price. Looking forward to what the devs have in store next.