Hey i don't get it first time i lunch it no problem I try to die too see what that does unfortunaly this force you too restart the game and after that the blue gun didn't work it's weird i mean i can still kill the blue enemy but the bullets don't show up. and sometimes i don't see the green bullet.
So yeah some bug and it's not really finish and all but hey that's your first submission keep it up :-).
and you put Audio at yes but I don't ear anything and no sound in the Asset folder so idk if its a bug or not ^^.
PS: did you think Ikaruga when you see the theme ? or Robotron perhaps ^^ that make me think of this 2 game