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If you're asking if it's a coincidence that I could do that, then yes, basically. The grass is from Diamondus, but as has been pointed out, it doesn't look much like the actual Green Hill Zone grass. Looks more like Emerald Hill Zone, although the Diamondus grass went through at least one complete revision during development and there are only so many abstract ways of drawing grass. The soil is from Deckstar, recolored, and the plants are from Sluggion and Jungrock, so I wouldn't say there's any resemblance. The only real connection is that both Sonic and JJ1 start with a grass tileset, but practically every platformer does.