In a bullet hell game, you should be able to distinguish the enemy bullet and you bullets. Making them all the same bullet just adds all the clutter and makes you unable to determine who is shooting you from where. Considering the fact that when you get rapid fire pretty much covers up the enemy bullets so you'll be sitting right in enemy fire without knowing if they shot in your direction or not.
 "Deadly Road Trip"){kind=icon}
 "Johnny Upgrade"){kind=icon}