One thing that might be nice is if tiles of the same line separated by one empty tile (including diagonally) would connect (drawing a line across the empty tile) so lines could overlap.
Related to #47, but distinct; I think increasing the amount of allowed space between connected lines might be a nice touch if I can do it well (even if it means re-generating images!)
From email:
Related to #47, but distinct; I think increasing the amount of allowed space between connected lines might be a nice touch if I can do it well (even if it means re-generating images!)