Well here is the deal regarding the border. It will spin so fast it is hard to read anyway :V neverless people will pause or view the images to see what is written on them ( even I did for the official games ).
Pew Pew Pew, Border of Idiocy, Border of Stupidity
Though stupid and idiot have different meaning. Like in dutch you have "stommerd" and "idioot". Pew pew pew is not going to do I think. Border of idiocy would be a good idea and someone mentioned a ⑨ in the center. Perhaps I can make a very vague and opaque ⑨ around the boss which has the same reddish aura seen in UFO.
Regarding the bullets. So it has become pretty "official" that we are generally going to stick with the shotsheet Drake posted. But if anybody insists on having ZUNtype bullet, we can discuss it and see if we will simply use those aswell.
Just for the non-danmakufu knowers. There is no such thing as standard bulletsheet for the entire game. Basically for each spellcard you can load up different bullet sheets. So it is quite flexible in use.