The iOS versions run on any jailbroken device (iPhone, iPod, iPad) but an ARMv7 Cortex-based CPU is recommended (iPhone 3GS and newer).
The configuration files are located in /private/var/mobile/Library/Preferences/explusalpha.com, to reset your configuration in case of issues simply delete them.
General Controls (can be changed in Options -> Input -> On-screen Config):
Touch top-right corner : Open the main menu
Touch top-left corner : Toggle fast-forward in-game