Google for some weird reason is removing compatibility for 32 bit apps (running 32bit on 64 bit is pretty much a non issue, which is why it's so weird).
However, this means I have to rebuild the game specifically targeting 64bit android (and there is not really any way to make 64bit work on 32bit, which is why I chose 32bit as it ran on both... until now)
I'll do that for the next release.