Hey there! Is the issue that the game doesn't start after installing or that the installation file couldn't be opened at all? For the latter, you could check the permission settings on your phone for installing files not downloaded trhough the google play store (android is a bit picky in that regard). You can check here, if youre unsure how to do this. Otherwise it should work just fine on more recent devices. For any other issues, you can contact me directly.
Have you tried waiting for a bit during the white screen? The game takes a while to load, usually up to 30 seconds on a mid-range phone (could be even longer depending on the device). I've added a loading indicator for future builds to make this a bit clearer. I can't think of any other reason why it would hang already on startup at two separate devices. But if the problem persists, I'm going to look into it more.