Starpew

Starpew is a gun that fires droplets of water. The gun has multiple levels of charge, and each level increases the number of droplets fired:
 * No charge: 1 droplet
 * 1 charge: 1 row of 3 droplets
 * 2 charges: 1 row of 5 droplets
 * 3 charges: 3 rows of 3 droplets
 * Fully charged: 3 rows of 6 droplets

It consumes 1 ammo per shot regardless of how long it is charged.

Trivia

 * This gun, as well as its charging AOE pattern, is a reference to the watering can from the game Stardew Valley.