Pada here, as always the Itch Goblin for the Team.
Sorry for the late reply, I just got off my Winter brake.
The only issue our side could find, if you have not fixed it yet, is that you may have accidentally not trusted the apk file on your phone, blocking it from working.
Other issues I could see either involve the Android device you use, not working at all with apk files due to age, or simple incompatability. Though, you must forgive me there, as an Iphone freak, I cannot call on that.
We of course do hope you were able to fix the issue, now after 2 days.
If not, and the issue persists, after setting the apk file to trusted, and trying to check if your device even can play it, maybe try another Download.
If any issue persist, we might be out of luck, as the issue is sadly not one we can fix on our side.
This is mostly information for others with similar issues, maybe unable to comment or ask for themselves in the future. As I do greatly hope you were able to fix the issues in time, or moved on.
With best hopes and wishes, from the Cafe and Team.