That's Gibbage as in "gibs," from "giblets"--the body parts strewn across the screen in FPS games like Doom and Quake.

Gibbage is a truly odd and heart-warmingly gory game that combines the mechanics of retro platformers with the aesthetic of the modern first-person shooter. The graphics are cartoony, and would not look amiss on a NES or pre-CD-ROM PC; the gameplay is deathmatch shooting madness. Your avatar runs and leaps about, gathering powerups and dispatching your foe with massive firepower, a 3D game's gibs replaced with pixellated blood.