Indeed, at this moment this is the only one available.
Concerning not working Android version, I am sorry, looks like all depends of device. It works great on a wide range of devices from Samsung Galaxy S3 (Android 4.4) to Samsung Galaxy S21 (Android 13) and many other devices I know. If it is possible to check on different phone, please try there or use desktop version instead. This version of 'Servius' Quest' is final and will never be updated again.