Does Android kill the app after around a minute in the background? You can try "whitelisting" the app so Android doesn't consider it for battery optimization.
adb shell dumpsys deviceidle whitelist +com.package.name.of.app

Will I be able to play "Where's George" with bitcoin?

(Haven't scanned the whole comment tree, so this may be redundant) There are museums within the facility, and even the weirdest aquarium you'll ever find, so it's definitely a blend of both. There's collections of door locks and hinges, columns and arches, blown glass, and more eclectic stuff that I can't remember at the moment.