idea 1: a pare of gloves that shoot laser fists
normal: 2 small blue transparent fists that do either 10 or 15 damage each (your choice, and they are size of the gloves)
charge: 2 red solid fists that do 40 damage each and are slower then the blue ones (also have a slower fire rate)
idea 2: a white chainsaw with a purple saw thing
normal: does slices that build up 5 more damage in the sequence (15, 20, 25)
charge: shoots out little purple lasers that do 5 damage each like a minigun
i'm pretty sure you won't think of adding these ideas but i'm just throwing them out there