Boxed In is a simple but still tricky arcade-puzzle game in which you help a cute cartoon robot escape from increasingly complex levels by pushing boxes around. Using the app's slow-paced, swipe-based interface, you can move the robot up, down, left, or right--but you can only push boxes, not pull them, so you'll have to plan out your moves well in advance to clear a path to each level's exit, while collecting required "gears" and using boxes to deactivate force fields along the way.
The interface can seem sluggish at first, but thankfully an undo option lets you take back any accidental swipes. The puzzles themselves ramp up in difficulty in a satisfying progression, and putting the levels into groups of five is a thoughtful touch (so if you get stuck, you can skip ahead to other puzzles within a group). Boxed In is a good idea that's fairly well executed; it's definitely worth a download for puzzle fans, especially during the app's free promotional period.