I just beat this room today myself.
A few hints:
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×Your ultimate goal is to kill the golem on the regular floor square that's closest to it.
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×You must let the golem move as little as possible but still be able to kill all of the seeps.
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×If you break too many crumby walls, the golem will wake up and waste you a valuable move in the trapdoor part of the room.
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×Is there a way to kill the seeps without waking the golem too early?