There's many work around s for file size though other games have done.
The cheapest way is to have multiple apk that pre-install the assets then the final one is the compiler + launcher.
It's essentially like a multi part rar file in theory.
I have looked into this and decided against it. It would be complicated both for me and for the user. There are too many things that could go wrong during installation and I don't have the resources to provide technical support to thousands of people. Joiplay is the only real option at the moment. Anything else would slow down development to the point it's not worth it. Once the game is eventually finished I'll make an android version this way.