It's great to see another entry in the DOOR series. As always, the atmosphere is great, the little teases of the larger story are also great and the puzzles are, unsurprisingly, great as well!
There were a couple of puzzles I still don't 100% understand in this one, but I'm sure if I went in with a non-fuzzy brain I'd get there eventually. I also wasn't totally sure that I'd found everything I could find in the demo, as there was nothing to alert me one way or the other.
Either way, I will be back to play this again when the full version comes out. One day it would be great to have all of the games together in one experience (perhaps chapter-based, the first game could be chapter one and so on), so that you don't have to hop between each short experience separately to enjoy the whole thing.
Keep up the great work as ever! =)