I have (what I think is) a great idea for Stonewater Cavern. There are a couple regular pushblock puzzles in the hot version, which are generally easy. But then, in the cold version, the pushblocks turn to ice and the puzzle becomes an ice pushblock puzzle! (Using the script I wrote, found in the showcase.)
Perhaps the hot side puzzles could be made a little more difficult by putting some lava geysers (damage combo cycling) where you would have to push.
I would offer to create some demo puzzles (hot & cold) if this sounds good to the group.
