L4 secret:
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×You're supposed to arrange for the goblin to move when you stop on/off a token, and there are supposed to be way more potions than you need. I understand that the tokens aren't necessary. Maybe it could be fixed, but there are so many possible moves to consider that I don't think it's worth it.
L6 1N1E:
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×I have a (900+ move) demo for this, in case I need to prove it's possible. No real need to test it.
L7 1S:
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×I did figure out Blondbeard's alternate solution, but I don't think I'll change the room.
L7 1N:
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×Thanks, CSR. This room doesn't work right. I think the main problem isn't the upper doors area, but the fact that the squares with the checkpoints, and some other squares to the south of them, start out equidistant from both sides of the main pond. They weren't supposed to be.
I'll work on L7 1N, and upload a possibly-final version in a day or two.