Good the concept and the visual/audio are good. "An actual puzzle?!" level is by far my favourite.
"Annoying Hallway" and "Around the round" feel a bit to long for what you have to do. In the first one i've checked every rooms, it took times, the second one i have go without the box to explore (because i don't know what i have to do with it.), encoutered ghost one/2 times but nothing more, I saw the exit door and done all the way back to push the box all the way to the door again.
"Sorry, is this the exit room ?" I like the concept to run away the ghost, but they are very fast, also you can't really go up, so either you go middle, either down, if you go middle you will likely die (or not, in a second run to test again the level after the ghosts hitted me i was just staying still and the ghost was staying on my character not hurting me before getting away, probably a bug), if you go down the level finish really fast with nothing happening.
Sometimes i got some audio looping, and sometimes maybe the music get a bit toomuch excited while nothing happening.
Overall good game.