A thinking game – Doublets Review

This game challenges you to visualize words and plan ahead. The undo function is clunky, and there have not been any updates to the puzzle list in a long time, but what's there can keep a person occupied for quite a while. It does not have the graphics of, say, Tiny Wings -- it's definitely a thinking game rather than a doing game. But one should have both, right?
Review by drw2 on Doublets.