Nostalgia

The clear difficulty for all-tread is definitely low. If you drag, it's obviously the lowest, and even if you all-tread, it's just that it's hard to hit everything, but as long as you save your stamina, you can clear it.

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The twists get really tough as it goes on, but since the BPM is low, it'll be easy if you drag.

If you twist and process the entire second half, the difficulty could easily rise to a proper D18 level.