Hi! I know this is late but Just in case you still want to know:
It seems that it's been taken off the Android Play Store. I'm not sure about iOS. BUT, all is not lost - the devs are still developing this game and there are several routes now in beta testing!
You can download the Betas by clicking on the discord link at the bottom of this article and joining it :)
There's also monthly updates on there, and they've explained that they know they have issues with the app store and are working on it.
Hope this helps! :)