I finished it. Besides the controls which are a bit on the clunky side on my opinion, I think the game is very well polished for it's immense size.
I think the controls feel clunky to me because you have to click twice to move one square while when extending into the wall you will move more than ten without clicking once. Off course I do see that the reason for these controls is the situation when two scaling tabs overlap when two Glob's are adjacent to oneother. One way you could fix that issue without making you have to click twice is by making you drag from the center of a Glob in the direction you want, which just happens to be something I accidentally tried over and over again when trying to clear levels. Another thing that could help is a rewind last turn button, especially with how speratic you move when extending into a wall.
Some parts of the game that really stood out to me were the part where you introduce the black character in a safe corner of the map to make you understand the mechanic of extending your other side to land further away from the wall. The other part I really liked was the level where you start one side of the level on a flat floor and you have to get to other side somehow. The centre of mass manipulation in that level was pretty impressive.
Mouse make squeeky sound