Okay. This is my idea for the new booster.

Booster- Power of the powers

I have 2 suggestions for this
-
When you take a Power up, your booster (rate of fire) is fully charged.
Renews every time you collect another power up
(I wonder if the gifts will also renew the booster
) -
Power up instead rate of fire give you a 20-30% more damage (when your booster are full)

Okay this is a joke xd
Food fills your rate of fire booster particles. (increased Player dopamine)