it's nearly impossible to recreate a sonic level properly, so just make it an arena with different elements from that level.
Recreating a level from anything is loving impossible unless it's mario bros.
Sonic the hedgehog is a series that relies on momentum based movement which blockland cannot stimulate, so it's pretty pointless to recreate levels unless they just take the themes or styles from those level's design and gimmicks and put them into something new like a DM.
That's exactly what I was doing. I was trying to make large builds, possibly deathmatch arenas, based entirely on the theme of a Sonic level, just like you did with Chemical Plant.
Although I'm an excellent eventer, there are still a few gimmicks that are impossible to do in Blockland, so I might just leave those impossible ones out.
Another thing I'm having trouble with is deciding what level to recreate. I'm probably going to make a thread asking for suggestions.