I was excited when I first started, But then after minutes of going straight down I felt bored and lost enthusiasm for the finding the creature. I asked myself "How big is this world? How far must I travel? How likely is it that I will find it?" - So for instilling such feelings feelings in me I applaud you if that was you conscious or unconscious purpose. At times I wondered if the rumbling was a clue as to where to go, but if there was aI couldn't figure it out.