I think if Mario and Luigi saw this, they'd have a fit. All of these mushrooms could go to them and bestow upon them various powerups and extra lives!
Real talk - this game's pretty dang fun. I know the point is to be attacked by mushrooms and all, but some enemy variety would have been cool, like maybe bonus enemies, akin to the UFOs in Space Invaders or something - nothing really threatening, but tough to hit, and if you do, you get a good bonus.