So ehm, this is my 2 cents:
- Writing: below avarage. The game tried to present Donny Bohgan knock off as somewhat calculative, but I felt like the game's entire problem (which is the captain growing suspicion) can easily be solved by just... not altering the girl appearances that much right of the bat. As long as you successfully brainwashed them, they will most likely agreed to change their style later, right? It does please a kink, though.
- Character designs: Prefer their pre-corrupted forms. Gyaru isn't my type. Also, imo, a corruption base game can work even without changing the character appearances. The Kangoku Senkan franchise, which this game is obviously heavily inspired by, don't even change anything about the girls design after brainwashing, but it still hot as f***.
- Pacing: well, people have commented on this, so I won't repeat them. I felt like the game has too many girls though, so the time we spent with each of them was pretty lack luster. A recent Lune game (the Gunjin Shihai something) with literally the same premise (a guy went on a space ship to get laid) had triple the length of ISIS, and it had only 5 girls, one of which is corrupted even before the game start, so 4 main targets vs 7 here. Sometimes less is more I guess.
- Typo: there are a lot of them. It gave of a feeling the game being unpolished.
To sum up: the game is fine, it's a free porn game after all. Nothing really stand out, both in the goods and the bads. Didn't see any bugs on my playthrough and it launched in a complete state. Fans of Kangoku Senkan can played this and might had a fap or two while we hope that one day, Lilith gonna release kangoku senkan 4 end give us the end of Donny Bohgan's scheme.