playfield

As nouns the difference between playfield and skydome

is that playfield is a playing field while skydome is a sphere or hemisphere with a texture on its inner face, used to simulate the sky or similar backdrop around a three-dimensional playfield.

As nouns the difference between playfield and mouselook

is that playfield is a playing field while mouselook is a feature that allows the player to adjust the view of a three-dimensional playfield by moving the mouse, analogous to turning one's head in reality.