I put this on datacrystal.org a long time ago. Seeing what editors are available for the game, I'd prefer hacking with hex rather than those editors. I think this might be what you are looking for.

0x00C438 - World 1 Ground Type status (ice, etc.)
0x00C439 - World 2 Ground Type status (ice, etc.)
0x00C43A - World 3 Ground Type status (ice, etc.)
0x00C43B - World 4 Ground Type status (ice, etc.)
0x00C43C - World 5 Ground Type status (ice, etc.)
0x00C43D - World 6 Ground Type status (ice, etc.)
0x00C43F - World 7 Ground Type status (ice, etc.)
0x00C440 - Pick-up sand status (vertical areas)
0x00C446 - World 1 Type of ground
0x00C447 - World 2 Type of ground
0x00C448 - World 3 Type of ground
0x00C449 - World 4 Type of ground
0x00C44A - World 5 Type of ground
0x00C44B - World 6 Type of ground
0x00C44C - World 7 Type of ground
0x00C44D - World 1 Interior Type status (ice, etc.)
0x00C44E - World 2 Interior Type status (ice, etc.)
0x00C44F - World 3 Interior Type status (ice, etc.)
0x00C450 - World 4 Interior Type status (ice, etc.)
0x00C451 - World 5 Interior Type status (ice, etc.)
0x00C452 - World 6 Interior Type status (ice, etc.)
0x00C453 - World 7 Interior Type status (ice, etc.)