I had an error happen. I'd gotten some credits from ero-attacking the bandits in the fighting ring (easy win, by the way), and had gone to go get a tattoo. Here's where the error happened. Or rather, the glitch happened. When I was selecting the tattoo, there was no option to actually select the tattoo. I was essentially soft-locked in the tattoo selection screen.
Edit: forgot to mention, I'm playing this on the latest version of Android. I downloaded the APK a few days ago, and only just started playing today.