There's a fun iOS game called GlyphQuest that works something like this -- there's a hexagonal grid of elements, and a monster. Connecting enough "like" elemen

There's a fun iOS game called GlyphQuest that works something like this -- there's a hexagonal grid of elements, and a monster. Connecting enough "like" elements (and, later on, combinations of elements) causes attacks on the monsters. Cute graphics, some nice leveling up mechanisms, well done.