It's explained on this page lol. Google JoiPlay.
The creator should have just made this an apk Instead of a zip file which may I add. I've seen so many people say it's so easy to do. I just don't understand why a lot of people just decide to just say fuck you to the people, wanting to play the game on Android. And say, sorry, you gonna have to download something else in order to get this game to play on your phone or tablet or whatever Android device you're using. I mean, at this point, the game worth playing at all on Android devices. I mean it's absolutely pathetic
To be fair, coding is a hassle. As someone who has dabbled in game dev stuff, I can safely say it isn't always that easy. Especially if you are not good at coding. I personally don't understand how folks make code from scratch, but I can often times figure out how to modify the code. So as for there not being an APK option, it might genuinely be a coding related issue. I'm honestly unsure if it is just as simple as right clicking and selecting "pack as APK" or anything remotely similar lmao. It probably requires android code to set it up as such, and not everyone knows how to. Meanwhile there are plenty of different options to get around that, namely JoiPlay. Since it got essentially revived recently, and has its own actual site instead of a patreon exlusive link now, you can often times run it through that. It even has easy install plugins for different types of things needed, which you just download and install and it automatically goes where it needs to. Mind you, not all games would be solved with this, and not all phones can handle it. I have recently played half a dozen options through JoiPlay and only had minor issues. Things like Futa World of NTR play fine as long as you have the renpy plug-in, but others like Goblin Girl Dungeon or Goblin Layer sometimes have some weird string of code that can't quite process properly. This kinda shows that coding is a lot of black magick fuckery and is not easy lmao. Just give it a try ya? This does remind me that I meant to try this one :o