Super-fun little puzzle game, and a creative take on the day/night cycle! I really liked the level design, too. The game does a good job of teaching itself, and I like how the regular world communicated what was going to happen in the dream world so that you could do much of your planning without a lot of trial-and-error. Graphics and sound design were solid, too (I love the look of the little nightmare guys).
My only complaint is that, for the Roombas, it was hard to tell where to set them down to get their paths to end where I wanted them to, which was my main source of trial-and-error. I also had one bug where one of my Roombas stopped moving in the dream world on the last level, but luckily there was enough leeway in terms of the number of objects to work with that I ended up still having a path. The hitboxes also seemed a little unforgiving at first, but not bad once I got used to them.
Really fun game; I'm glad I came across it. Great work! :)