#3 improved highlighting for visually impaired

[Anonymous]

Hi everyone,

my dad is losing more and more of his eyesight and this is about the only game he can still enjoy on the computer.
Would it be possible, to make a higher contrast version of the highlighting function (when right-clicking a tile and it highlights all of the same kind) i.e. coloring the tiles in a color like black so it's easy to distinguish from the other tiles?