the progression is a lot smoother now, which is good. liked how the level select is not so linear. got stuck at 2-2 for some time, then decided to come back to it latter, but the game did not save.(i assumed it would since there are profiles on the menu). as the other anon said, a new palette or something to show progression would be nice, perhaps every time the first number of the series changes. the bue-orange-green works well, but i did not like the look/color of the crates, door, door pads and level select. perhaps use fewer colors, idk. the framerate animation of the doors opening is also very slow. a few times i instinctvely held the Z key to undo faster, so i think it would be a good idea to add holding to undo/redo