You can just remove/change walls after having placed all. You see your current score, but can keep iterating.
Yes but it would be nice to see the targets, so you know how far off from an optimal solution you are. I know I'd spend more time looking for better solves if I knew the current one can be improved
Yes but it would be nice to see the targets, so you know how far off from an optimal solution you are. I know I'd spend more time looking for better solves if I knew the current one can be improved