I like'd it. Yea it's kinda slow, but is its way to express the art and the game idea. The game balances this by making short levels, and very well designed may i say. The position of windows in dead ends showing the objective, a new door that just opened or path you didn't saw.
Love how there's absolutly no interaction besides the buttons and then they give you a pipe or whatever, then i started smashing everything. A well done experience.