Conceptually very kinky and the "twist" is well telegraphed through the emails. Great use of both themes.
Visually, this is a text-based game, but I wish there had been some visual distinction between the generic and special subjects. Kind of forgot I had a volunteer and intruder in there until I clicked their pods. Gameplay-wise I couldn't really tell if the upgrades were doing anything significant since you don't spend much time on the generator screen, but I assume they did.