My question is: What happened to the other passengers who were on the same boat? It’s extremely unusual if he was the only survivor considering there were others on deck while he was stowed below. Did he kill the other passengers? But, he allegedly lost his memories (I’m assuming from the physical trauma) and wouldn’t have time to kill anyone before the ship capsized. The family is still weird, in my opinion, so did they do something to the other passengers?
Another set of questions is: Why would he set up these “games”/riddles for himself to solve (e.g. the phone passcode)? Is it even possible for him to set these up himself if he did lose his memories? If the MC did not set those up, then who did?