This isn't really a walkthrough, just something that I had the time to do. When you play as Minion, he speaks in a number code. I have cracked that code, and this is what he is saying, level for level.
Level 1: I do not think this is real.
Level 2: I must speak in code or he will discover me.
Level 3: We are trapped in his head.
Level 4: This is how he sees the world, how Sweet Tooth see's his life. It is not real.
Level 5: All of us are trapped in his head.
Level 6: I miss the old colorful world.
Level 7: We will return to our old world one day.
Level 8: In the real world my name is Marcus Kane.
Added by: Aeramae , ID#3603