I think the game should have more base rooms (as in, already existing in the game without contribution), considering the concept relies on community-built content, as the process is not really convenient right now. I, for one, am not eager to share my password through a third-party application, so I couldn't "leave a dream behind". Still, I see a potential of an idea, and it's very interesting. I think a good idea for building on top of it would be to add some way to rate other people's riddles to ensure some level of quality in a pool of puzzles a new player receives, sort of how it's done in this type of games (think Super Mario Maker or Dreams)
In terms of execution, there is an issue of the interface not being responsive to the window size - I had some text go out of a visible region when reached second or third hint, and even on full-screen, some parts were slightly cut off. Despite that, and the fact I had no indication that a textbox is currently active, the presentation is straight-forward enough that I didn't have any other complains.