Hey follow below and it will work for you.
Did you downlaod the PC version as per below?
How to play on Android:
1. Download the PC version (windows) of the ren’py game.
2. Unpack the .zip using RAR or your desired unpacking tool.
3. Download Joiplay and the Ren’py plugin through the Google Play store.
4. Launch Joiplay, when your on the main menu click the “+” button on the bottom right. Enter game name, version and (optional) game icon. On the “Executable File” click Choose and go to the location where you downloaded the game, when inside the unpacked game folder choose the .exe game file and click Choose. When all information looks correct, feel free to click on the “Add” button. You’re now done and good to go. Have fun! (You may also want to move saves around) To play rpgm/ rpg maker games you can use this app: