Enrique Brandariz made Chemin, a puzzle app that I really like. This one, Spelling Walk, has a topology feature too.
The idea is to spell the word by creating a path. As you trace your finger over the tiles, they will disappear.
I like this game too. But will probably not complete all the levels.
I think this game would be perfect for kids who like word searches. Certainly kids who like spelling will eat this up.