There could be a number of reasons that Puzzle Explorer isn't working on your device. Here are 3:
1. The device needs to be restarted. Sometimes when too much time has passed between device restarts, funny things can happen. A lot of problems on a device can be solved by turning the device off and on again. This is a good first step toward troubleshooting why Puzzle Explorer is not working on your device. Just turn it off and on again.
2. The operating system is too old. Puzzle Explorer works on Android 4.0.3 and newer versions. Update your device to the latest version of the operating system. If you cannot update your device to at least Android 4.0.3, unfortunately Puzzle Explorer will probably not work on your device.
3. The device is below minimum specifications. One downside of rapid improvements in technology is that technological devices become obsolete much quicker. There are minimum device specifications necessary to run Puzzle Explorer. If your device cannot run Android version 4.0.3, then your device is below the minimum specifications and unfortunately Puzzle Explorer will probably not work on your device.
If you have restarted your device and confirmed that it is running Android 4.0.3 or newer and you are still having problems, please let us know here. In your message, please include the make and model of your device and the operating system version you are running on the device.