Here's a breakdown of how your information is used and/or collected by Return of the Spectre (bottom line: we try to be pretty good about these kind of things).
Information We Collect
Return of the Spectre does not store any information on your device.
Information You Share
There is no option to share any user data through the game. You can always let your friends know that Return of the Spectre is an awesome game though!
Return of the Spectre does not store anything that would require any kind of security.