- Les Yay: Once again, Claire. She seems to enjoy the communal gender-segregated showers on Callisto a bit too much.
- Nightmare Fuel: The Red Panacea clinic. A perfectly normal clinic, except that it's floating in space, completely abandoned, and covered in some sort of living red biomass. There are no survivors, but there are traps that look like survivors, complete with begging for help to trick people close enough to grab. You'd think the random goat heads would push it over to Narm. They don't.
- Sequelitis: While not bad by any means, taking the story into space created a very strong sense of disconnect with the events of the first book.
- Tear Jerker: Penny's gradual descent into Heroic BSoD as it becomes ever more apparent that her presence and interference was responsible for most of the conflict in the book. It starts with this exchange between Penny and Remmy, following the disaster on Callisto, and only gets worse from there.Penny: Fixing things isn't my specialty, but if there's anything I can do to help, I will.Remmy: Why would I want help from a meat puppet?!Penny: I only wanted to help.Remmy: Like you helped everyone on Callisto? By infesting the system with the monsters YOU made, so the Puppeteers could use our weapons against us?Penny: I didn't want that to happen any more than you did.Remmy: Oh, yeah? I knew those people, Bad Penny! I lived with them after your Puppeteer masters took over Io, until Calvin and I couldn't live with the automatons' stupid, inflexible rules anymore. Do you want the names of the people I saw blasted and set on fire because of you?Penny: I'm sorry. If I'd known my inventions would turn on people, I'd have destroyed them myself.Remmy: After they fawned over you as the greatest mechanic ever, how could you not know that messing with Puppeteers would get people killed?
YMMV / Please Don't Tell My Parents I Blew Up the Moon