Here are my notes on Nancy Drew: Secrets Can Kill (1998).
1. The premise of the game is that Nancy is going undercover as a new student, in Paseo Del Mar High. This premise is completely derailed, when you realize the game takes place in May or June. I got that date from the background art. Specifically, the poster next to Connie says Prom is on May 23rd, and the bulletin board with the hidden message "search below danger sign in kitchen" says that yearbooks are coming soon, on June 12th.
This means Nancy is starting as a transfer student in May. Nobody wonders why a transfer student is starting at the very end of the school year.
Furthermore, look at the first sentence of the game. "Dear Dad, who would have dreamed taking an entire semester off to visit Aunt Eloise in Florida would result in another case?" Nancy has been in Florida for the entire spring semester, but she is only attending high school just now. What did she do during March and April? Attend a school other than the one Aunt Eloise works at?
2. The game begins with Nancy searching Aunt Eloise's house for hidden items. It's a nice challenge, but you have to wonder why Aunt Eloise decided to hide things from Nancy. Is Eloise trying to sabotage the investigation, or does she not trust Nancy?
3. There are three separate menus at Maxine's Diner. One is on a table, one is behind Daryl, and one is on the display right of Daryl. None of the menus have matching prices. One says a burger is $2, one says a burger is $1.30, and the third one (the menu on the table) says that the cheeseburgers range from $14 to $24. Fourteen bucks for a cheeseburger? No wonder this place never has any customers!