Okay. Let's assume that this "rather distinct graphical style" choice is entirely coincidental then (which it isn't - it's been chosen because Minecraft became insanely popular and the Cube World creators are simply capitalizing on that) because that somehow makes sense .
I'm still going to have to go on and say, however, that the graphical style doesn't define the game, nor is the graphical style the game itself, in its entirety. The graphical style is an aid to the game.