Strange, seems to be working for me. I get a zip file instead of .mgc, but renaming it works.
Sadly, Snapdragons, especially older ones, are struggling with emulation due to their sub-par NEON support. Still, an SD820 should be capable of running Xwing well enough.
You should set cycles=max, and if you’re rooted, try to use the performance governor.
When you run this benchmark, what result do you get?