An update. Recompiled without the "Minify Script" option and re-uploaded and game now is available again (had to clear browsing data from android but that would be normal). Then re-compiled without minify option (no update to the code whatsoever) and re-uploaded and it worked again.
Don't know if it is a co-incidence. Pretty scary though. Still don't know what happened coz it suddenly stopped working. It would be nice to know if this was something from the back-end or whether it is expected to happen again.