Chiming in on the crash reports; I've been seeing this one pretty persistently.
The output I get when I run the game (to a crash) from a command line is:
AL lib: (EE) alc_cleanup: 1 device not closed
Error after opening sound data
Googling that error and haxeflixel shows this issue on the OpenFL library github,
Maybe a recompile with an updated OpenFL would fix the issue?