Hats off to you for this breakdown! You've really dissected the game down to its core mechanics, and it's incredible to see someone engage with the systems on such a deep, technical level. This kind of insight is super valuable and really rewarding to see as a dev.
And honestly, I never actually considered how the three obsidian layers could make Grampshell almost impossible to clear in hardmode (due to the lack of footwear). That's such a great point. Thank you for sharing your thoughts!