Very interesting gameplay. Impressive pixel art. Very well executed. One issue I noticed is that sometimes I don't know if a bullet is gonna hit me or not, maybe try add some UI indicators to tell the direction and the distance a bullet can travel?
In case you are curious, "The Feiwu of Nanshan" or "The noob of the Mountain South" refers to a notorious Chinese game company, you can think of it as EA but 100 time worse. But anyway, I really like your idea, good luck on your game jam.
