I didn't really understand that there was an actual threat, after about one minute of playing I guessed that nope, this is the sort of horror game with spooky sounds for no reason. I did notice a few traffic cones appear, but never saw this guy (and guessed it was just too dark to notice the cones). And even going back now that I know the threat, I still can't see him. So maybe he isn't visible long enough or maybe it's just too dark, I'm not sure but it seems he just appears at random spots, maybe it could've been more authored where he appears. So you could tell him to make an appearance under this flickery light, which grabs my attention, then it'd be a lot easier to notice this. It is a very cliche horror trope, but imo having a vast featureless street makes it very hard to notice that anything happened. And there is totally a balance here, I understand you want something subtle and anxiety inducing, but too much subtlety and you get the opposite where it seems like random meaningless sound effects. Particularly at the start, I think it's important to make the threat very obvious.
Perhaps if you ignore the sounds he could get closer and closer and closer, then if you've been ignoring him and turn around, suddenly he's right close, he does his vanishing thing and then blam that's stuck in your mind. That way if you're vigilant, all you'll ever see is those distant glimpses, but if you let your guard down that's when the game shocks you back into that paranoia, to confirm those gut feelings.
But anywho those sounds are very well done, I can't believe you made all that, very impressive! Also I noticed the font isn't credited in your credits, I believe it's this one by ggbot for anyone else looking. Overall a neat little game, and amazing audio design, when the guy did actually attack that got me good!