I don't know if I am the only what happen this but in android i cant download any version, I download the APK and when the download finish this dissapear, it doesn't appear anywear of my device.
Viewing post in Darling Touch v0.6.0 Release comments
Your phone might have a security setting that prevents APKs from unknown sources from being installed. You’ll probably need to find a way to disable that setting before you can install the APK. I know it sounds a bit risky, but even I have to turn that setting off on my own phone whenever I'm testing the game.