Probably (for me) the best nightmare themed Ficly to date.

Seems to be written hurriedly.

Floorboards and tile don’t work together. I would suggest changing it to something like “hit a corner of a loose floorboard”.

The clock part, since you already have it in italics, you don’t need the last part “it read”, 1:00 is perfect. Further on, you need to change the 1:00 am to a.m.

I like that it all runs together, some may not. You can break it up if you want, but I think your structuring represents how a person thinks when they first wake up.

The only part that “confuses” me, but could also be a part of the “plot” is your sentence about your protagonist waking from a nap. I don’t consider it a mistake, it may be a part of the story itself, why someone is taking a nap at 1:00 a.m.

But the story and it’s bones are perfect, it made my hair stand on end.

Thank you so much for all your pointers, I’m trying to turn this into a novel if I can. I’ll be sure to make those changes you pointed out.