1) Corresponding Floor texture for SNDWALL and SNDPILRG.
Well, I miss floor textures that matches SNDWALL and SNDPILRG. Just it.
2) Vertical moving hang-able chain
It's a chain that moves down and up upon holding on it, depending on flags and values you could set:
-- Move up: character jumps and hold on the chain, then the chain starts to move up and carry the character. If character jumps off, the chain goes back to the original position. Useful when the character needs to get out a hole, to go up a narrow vertical passage or a wall to reach higher levels.
Flag and Values:
- Length
- Vertical variation (negative variation would make it move down)
- Vertical speed
- Deaf flag: makes it twice bigger.
- Another flag: upon reaching its end position, the chain releases the character (so character doesn't need to jump off) and goes back to the original position.
-- Move down: same as above, but it moves down.
-- Tagged to a special effect: I don't remember whether it was Sonic 2 or 3&K, Sonic pulls down a chain/chord and it turns on the light. I think a chain, upon being pulled down, could open doors, change the tagged sector's light level etc.
EDIT:
3) Horizontal moving hang-able chain
Works like rope-hangs, but instead of hanging on a rope, you hang on a chain; then the chain starts moving from a way-point to another. You can set the length, deaf flag and a special flag that makes the chain release the character upon reaching the end point.