Nice and simple game! The maximum capacity on your boat adds an interesting dynamic where you have to decide who to prioritize saving, since you'll need to go back and forth.
I didn't like the controls though. While I understand they could be intentionally difficult, to me it simply felt unresponsive. Turning should be much faster. Adding obstacles could be a more interesting way of adding difficulty.
All in all though, great work, especially since you just got back into gamedev and only spend 5 hours on it!