Ah awesome! Let me see if I can explain this better.
Each of those white floor tiles is a game object, and the player character should move from tile to tile on a button press. So if the player presses right the character will check his current tile, find the next tile in the array, and then lerp from his current tile to the next one in sequence. Every move is absolute, like a piece in a board game.
I have a general idea of the implementation I need, but what I don't understand is how to create a variable referencing the array. All the variables I've made so far require an object reference, but the array itself isn't an object, it's a script on a game object.
I think I'm simply missing or misunderstanding some fundamental aspect of Playmaker, and likely Unity itself.