I liked it, it's a bit tedious to get through at first but then the game is deep and you have to think for real. The simple graphics help the player focusing on the game.
Their is a couple non-ergonomic details that annoyed me a bit, but nothing too bad : the bin is not so obvious, I would rather like a button on bot click offering to delete and rotate, rather than using keys. I wanted to select and drag in one click, which was not possible. The icons of the pulling bot and the one that push while staying in place are easy to mix up.