I'm a big fan of puzzle games. They are the perfect genre for quick play sessions on a phone while out and about or during brief stretches of downtime at work or at home. I'm constantly on the look-out for fun new titles to add to my collection for this very purpose and am pleased to be able to mention follow.trail [$2.99], a path-clearing puzzle game released just last week. In follow.trail your goal is simple: Eliminate a series of squares from a rectangular game board on your way to the exit. You do this by following a trail of dots, represented by what look like standard game dice with one, two, or three dots. Each time you land on a die you reduce the number of dots on that die by one. When all dots are gone the die disappears, leaving a blank space on the rectangular game board. Your path must move over all the dice in a level enough times to eliminate them on your way to the checkerboard die that serves as the exit for each level. Most of the dice in a level are the dotted kind, but many have different symbols that denote special powers. Arrows, for example, slide you one square in the direction indicated. Other special dice are portals that bring you to a matching die somewhere else on the game board. Others still are a set of two linked dice that disappear after a certain number of combined touches. Further complicating matters is what happens if you move onto an empty space?a black die with a single dot on it appears. Subsequent visits to a black die increases the...