Emulator: Final Burn Alpha v0.2.97.42 (This can be why it interprets the difficulty switch as Easy, despite looking to be fresh defaults. The enemies shoot as they form in stage 2) Just a new runner to the original Galaga here. I hope I followed the exact ruleset for this.

I can also file this under the 1 Challenge Stage subcategory. VOD was re-timed to 1:35.56 for the challenge stage, low-1:32 for Extra Life 1. I'll submit the extra life 1 time as whole seconds to cut a little bit of re-timing (There is no other 1:32 on this).