No worries on not playing too long, it's content runs out basically after the first siren, hah, with just more sirens to follow along as you get further.
I think I would have actually liked the idea of a smaller boat more, as well, if I'm honest. My original idea was more based around a smaller fishing ship or something, with maybe 4 or so people. But we ended up going larger, which made certain things a bit more tricky.
Thanks for checking it out!