I've just uploaded a BETA2 version of the apk. I've expanded the tutorial screen width which should make the OK button visible. This is a quick fix until I can spend more time fine-tuning the UI for Android.
Many thanks, have a good night or whatever it is for you. I really appreciate it, it's cool when a developer cares about the comments. Thanks again and big ups!
No worries. You're not the first Android user to report that issue. I'll need some time to improve the Android UI so please report any other issues you experience.