Very cool game design and atmosphere! The metrics of hull damage, power -> light -> sonar, and oxygen worked well in tandem, and made the descent challenging. The story snippets along the way were a great addition to keep player motivation alive. Art was gorgeous and gave this world a lot of authenticity.
Died early in my first run due to low oxygen as I didn't know there were collectibles along the way, but learned so by reading the comments below. Second run, made it to 268m, which given by the intensity of the story notes, seemed like it was close to the win condition.
There have been a lot of promising debuts this GWJ, but with only three months of collective experience, you cats did absolutely fantastic! Well done. :)