As long as the power zone is visible, your cosmic mammal has two extra abilities: you can aim its shots using the second analog stick, and if any enemies have made it up to the rim without getting a faceful of space giraffe spit, you can “Bull” them off the edge by running into them, earning mad crazy points.
Thus, Minter has succeeded in crafting a shooter in which you score higher by not shooting. This gives the game a totally different feel, and while game aesthetes will surely admire the subversiveness of it, many players will likely find it too non-intuitive and confusing.