Whenever i try to download it tells me to update then has a error, what should i do
I assume you are using the Itch launcher, my suggestion is mostly maybe try to download the game manually.
in downloading the android version, any better way?
If you only have the demo version you can use the "Web Demo" its basically browser play hosted by me.
But if you did buy the game then your best way is to download it manually.
I tried to download the main game after purchase, did not work well. But I found a way. Alls good here. Fun game
