Thanks so much for playing! Yeah, I definitely wish I'd spent more time on tutorials. For the library, you need 3 levels of submissiveness combined (so the aphrodisiac and a gear) to lure the next worm, but I can see why it isn't obvious.
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Bless, that hint was enough for me to come back and finish the game. Hoo, totally worth it - the writing is fantastic all the way through, but the writing from the surgeon’s office and after you get the IN HEAT card is so, so fucking good. It also makes the narrative arch work so much better - that descent into the breeding frenzy works so much better when you see how far you fall. This is definitely one of the games I enjoyed playing the most!