The latest release (version three for 2014, simply called Puzzler World) requires internet access to even launch, making it useless when WiFi isnt around (which is usually when I play Puzzler World versions one and two). Also they changed it so you need to constantly purchase new puzzles rather than just pay once for a mega-pack. Stick with 1 and 2 if you have them.
Beejor about Puzzler World