I vote for character customisation instead of random combination every time we click. For the new survivors too, so we can make them look like our friends irl (and possibly kill them?)!
Mhm, finished the game and I don't see how people can use several hours on this. A tip is to shove some pieces to the goal, so they won't be in the way when you move the red line. If you have a hexagon, try to take a long line and wrap it around it. If you can't get the medals, let me remind you that you can push the pieces with another one.
Good luck!
I agree that this game isn't perfect, but there's no need to badmouth the game like this. Just say that you don't like it, because it doesn't have a 1P-mode (or other reasons).