I would like 2 modes. 1st mode is Normal mode. Things are normal. (duh)
2nd mode is Infinite Silk Mode. Your red meter can go down, but you silk meter can't! This is sort of like an arcade mode.
I think something that should be added is a 5* variant of the Winmillion. Even though it will just be a stronger version of the Winmillion, I think it should have the colour scheme of the Spur. And also on the 3rd slash, make it shoot 2 orbs instead of 1. And the charge attack, instead of shooting one BIG orbs thingy, make it shoot one BIG orb with two small orbs going diagonally outward.