Hey, unfortunately, this is a compatibility issue. I've had this same problem before when i downloaded, but it didn't happen when I tried to play on a better device. Still, this game is coded with Ren'py, sometimes the mobile version doesn't work properly on some devices, but the game itself still works when you try to run the windows version using an emulator (like joiplay - download the app and ren'py extension via their patreon). Try and see if it runs the game for you. I must advise it can be a little time consuming so be patient