A solid little Slender-like which I'm always glad to see.
I was pleasantly surprised by the design of the monster, managed to make a really cool looking machine-creature with distinct features despite the visual limits of the low-poly style. Only gripe would be that, if I didn't intentionally go back and let it get me, I might have never seen it. I'm not sure if there was anything that changed its speed or behavior as more pieces were picked up, but it seemed incredibly easy to avoid throughout the whole playthrough.
I also really liked how you mixed up where in each structure the parts were located. At first I thought it would be too easy and straightforward, just follow each light and grab a part, but when I started finding them inside the structures, with the one that had me having to find the trapdoor and popping up in an otherwise inaccessible house actually stumping me for a bit.
The one aspect that did provide some definite tension was having to re-assemble the car one part at a time which inevitably forced me to be in one place long enough for the monster to catch up. Though it was pretty easy to kite away, buying me some breathing room, the little detail of having to open the hood to place the last couple parts meant I couldn't simply run by it, slapping parts on as I went which helped give the last moments a real sense of urgency.
All-in-all, a fun experience!