This supports formats from Sonic 1, Sonic 2, and Sonic 3/&K. Get a Layout file from a Sonic decomp and put it into the Data variable, watch the magic happen. This doesn't have every level chunk available, you'll need to extract them via SonLVL for that. I'm not publishing the link, ToS reasons.
Still not including every possible chunk. Includes logic for Sonic 2 and Sonic 1 layouts. Level drawer has a few extra blocks for handling special chunks, REMOVE IT IF YOU'RE NOT USING S1 LEVELS, I'M NOT ADDING MORE VARIABLES FOR S1 LEVEL TYPES.