Although not wholly original, "Puzzle Agent" nonetheless felt like a breath of fresh air for adventure games. Instead of more of the same point-and-click cause and effect, the game unfurled its mystery through an intelligent assortment of brain teasers in the same vein of Nintendo's terrific "Professor Layton" games.
"Puzzle Agent 2" ($7 for iPad/iPhone; rated 9+) has more of it to offer. The tone and visual style confidently migrate to the sequel untouched. While No. 2 introduces welcome new brain-teaser types, most of what you see will be familiar (and mostly easier).
The design, polish and variety of puzzles ultimately made the first game endure. That applies the second time around, too.
