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Marble Zone is the best zone in Sonic 1
(imgur.com)
Tabletop, DnD, board games, and minecraft. Also Animal Crossing.
3rd International Volunteer Brigade (Hexbear gaming discord)
Rules
I try not to abuse it
Now that I think about it, a lot of the critique of Sonic 1 being too slow is more about not having the spin dash, which is a fair critique for the game engine but not a fair critique for level design. I honestly don't know how the zones would play out if you can use spin dash.