Nice level, perhaps little bit hidden and with theoretical shortcut as I didn't use the full level... Thanks! Spoiler: Shortcut? Once I got to the medium floor, I autopilot to the elevator piece (part of the win block) to get to the top floor and done.
My situation was like @chemi 's, but the level was still good. The thing I didn't like was the hidden part. There were almost no clues but just guessing on the down floor. Anyway, thanks!
I loved the logic and the way you used different pieces for more than one purpose. The guessing didn't really bother me, nor did the hidden parts, but I don't seem to mind those as much as some. I was more frustrated by the balls, which can seem to have a life of their own if your device lags. I'm not a fan of pushing balls with draggables for that reason.
Figuring out how B can be moved took me quite a while but, in retrospect, the puzzle is very logical. Interesting hidden mechanisms. Very nice level!