Hehehe, glad you like the fish, he was my favourite character to design. <3
Currently there's no way to increase your health, we had eventually planned to add other selectable characters with variable health-pools, but quite out of scope for the Game Jam.
As for updating, totally unsure! We have plenty of ideas but not much time to implement them haha. This was very much a passion project and we all had to sacrifice a lot of time to make it happen. Maybe some day in the future, but all I can say is, this is not the end for the North Road Crew. :)