Love it!
I made a level I was actually pretty happy with, but I saved the "locked" code after accidentally erasing a key, so it's unfinishable :/ I'd love to fix this one, but oh well.
Anyway, here it is:
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Don't worry! The puzzle is actually still beatable, You can smuggle a box into the room with a single wide water gap to sneak past the two gate room, allowing you to beat the level with a key to spare. Here is the editable version:
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