Well it definitely fit the theme of not real, although, sort of in the backwards way I guess. Since the dream world technically has all the real platforms and the "real" world has the platforms hidden. So technically, it feels like the real world is the "not real" part to me.
Anyways though as for mechanics and gameplay, the mechanic is interesting, if a little hard to use since you can cover up the ghost so it makes it harder to follow it when you do. I feel like if the ghost showed in front of me it would help to figure out what it was doing earlier.
Otherwise though ignoring some of the bugs I ran into (mainly the one everyones mentioned, the platforms moving). It was an interesting setup, I do feel like the levels get really difficult with some.. very jardto performance trick jumps. Especially the one where you say you don't blame people for skipping. It's a little crazy, even just to get to the bed in that level which is half the challenge. Not to mention how difficult it is on the way back.
Which, obviously seems to be the goal, but I do have to say it does feel like the spike hitboxes, and or the player hitbox, is a lit bigger than it seems a times. Mainly when I was trying to squeeze through the one block gapes and the player constantly got hit by the spikes when they didn't look like they had collided. Either from walking to the side of the s[oles or from falling tiny bit too much.
It ended up being relatively annoying that I seemed to be dying to something that, at least from what I can tell was more due to there hitboxes than anything else. But it's also possible I was misunderstanding something etc. I do feel like either way though, it's quite pushing trying to get through those tiny sports, and not even in the general challenge way, just in the "you somehow hit the hitbox" way.
Overall though, a well done platformer game with a relatively well executed mechanic and some pretty difficult platforming challenges which is always nice to have a bit of challenge, just gameplay wise, not weirdness wise.