The blurry lines are a cool effect. Maybe the tubes in the machine are cursed. Maybe this space captain's pre-combat ritual is the same as the guys from Fury Road.
The first round, my instinct was to hold down the shoot button, which quickly became "oh no ammo is a thing". The second go through was a lot more tactical and timing the shield bounces makes for a totally different feel.
Maybe, given more time, the player could switch between a typical unlimited ammo shoot 'em up ship, or the bouncy shield ammo one, and have two totally different play-styles to choose from.