Are you playing from WebGL or using the android app? If you're using the android app, what's your android version? Maybe it's some sort of compatibility issue.
Why it didn't work? What error did it give? Anyway yes, I think I understand the issue now. I think I may have forgotten to put Mobile Controls in the WebGL as they were made in two different times. Either way, I'll test the WebGL in my phone and try to fix the issue in future releases. However, I'd also like to attempt to fix whatever issue you're having with your Android App if you could tell me more information about it. Thanks!
I've looked on google and found this: https://xdaforums.com/t/how-to-install-old-apps-in-android-14.4625641/ so if that's the issue, I'll try to increase the compatibility level to Android 7 and above, this might solve the issue. It's likely I'll fix either (or both) issues on R9, as R8 has already been built. However, if I am sure that either fix works (At the very least WebGL on phone since I can test it myself) I might push it to R8. I'll reply to this thread again once a solution to the issue has been found, thanks for letting me know!