There's not a lot to say. This is a simple little game and it specifically avoids gathering any info about you in the first place. It doesn't ask for your real name, nor your email address or any other personal information. It should be completely safe.
This game uses the normal 'preferences' system to store your high scores, but does not otherwise use your USB storage. Apparently the game has access to some form of phone ID, but does not actually use it for anything.
Enjoy your day on this planet