Honestly i'm not sure what was up with the shark, it seemed to appear at the start of the area then float off the map, then sort of floated around randomly and ended up in the room outside the captains quarters where one of the banshee's also followed me. I didn't kill the shark the first time since I kind of assumed it was a patrolling enemy I'd have to avoid based on it's movements.
The comment about difficulty definitely makes sense, and I agree with you it's better to have an easier game for a jam like this. my own game kind of has that "fault" with being too easy as well haha.
Also makes sense about the map, I find there's always going to be something that suffers from the time-limit in a game jam and the maps probably one of the more acceptable things to be a bit weaker here.