While the pieces are tricky to move I did it after realising they didn't need to move a full block width each time.
Good idea and very good design of the pieces to move (you came up with a good design so the pieces don't cling to each other - well done!!!). But unfortunately, to win, I needed that B moves only in two rooms from a large set. Design and idea - SUPER! The gameplay turned out to be much easier than it seems, maybe you didn’t take something into account and there are short cuts