I really like the mix of 3D and pixel art that you have gong here, they match each other really well and that's not an easy thing to do with this style. The little character animations unique text and sound effects do a lot for making each of them come to life. The music matches the scenes and gives each area its own special feeling, I'm guessing you wrote it yourself for this game, awesome job! The level design is nice, but a little too spacious in my opinion, I suggest condensing or decorating some of the empty areas. It may also be better to remove the run button and set the run speed as the default movement speed, it's usually preferable to get rid of buttons that have to be held at all times.
I think it might be interesting to interconnect the areas with some secret passages, so that there are ways of getting around without returning to the lobby. The whole premise just really makes me think of Yume Nikki and I'd like to see it go even more in that direction. Overall, a very interesting world and definitely something I'd like to spend some hours exploring once its fully expanded.
Great work!