It’s called Stereogram, because it’s made of moving stereograms.
It’s pretty easy to lock your eyes onto a room and pay attention to the moving parts.
The little details like falling leaves and streaking raindrops are very nicely done too.

For a difficult medium, it looks great.
Stereogram is available pay-what-you-want (with no minimum)from Itch.iofor Windows.
Fast-moving first-person stereograms are a mighty bit of eyemurder, mind.