Wow! This is dark, Paul. Good to see another side to your creativity.

Kids love to be scared and this one would fit the bill nicely. I can see them wide-eyed under their covers determined not to go to sleep.
It's a great story, very visual. I could 'see' what you were painting.
The only thing, I'm not sure the final stanza rounds it off - to me it seems to lead to another 'scene' or comment. Or if not another stanza, maybe a bit of reworking of the last one, or perhaps changing it around a bit with the second last. I'm not sure what exactly, but it does seem to need 'something' changed or added. Perhaps its the pacing in the last two lines that need to be tightened, made a little more clipped to bring it to a close. Alternatively, you could perhaps make it appear that he's off again, leaving his long hall to collect more dreams - a type of 'open ending'.
Food for thought, anyway.
Cheers, Hannah
