For the latest versions of Android, I haven't tested it because my phone only has Android 11 and it works perfectly. If you want to test with a more recent version, I invite you first to download the free demo of the game to see if it works. I personally think it should work.
As for the different versions of the game, they are not separate, which means that version 5, for example, also includes versions 1, 2, 3 and 4. FYI, I only sell the basic version of the game on Itch.io, but there are also other versions of the same game with many more options, such as additional scenes and animations, a walkthrough, music and sounds... These improved versions can be downloaded from my Patreon page: https://www.patreon.com/neonstar
It's a bad thing if it doesn't work with Android 15, but there's not much I can do about it, unfortunately. It's certainly related to the coding software.
As for the price I'm offering on Itch.io, it's not a premium price, it's just a standard price. Having said that, I also have a strong community on Patreon that supports me and encourages me to continue with the Elite version, which takes a lot more time to make (compared to the basic one). I never force people to buy my game. If you think it's too expensive, that's your opinion and I respect it. I think differently because I work a lot, several hours a day on my game (in addition to my regular work and my family's life). I think my price is justified, especially compared to some other games where developers release a new version every 5 months with only 300 renders... and then disappear for many months, and then suddenly release half a version of their game making up lame excuses about computer crashing, all the data being lost... Of course, this kind of game can be sold for 5 dollars, or even for free. Whatever, that's not the case with my game.
But once again, I respect your opinion. Best regards.