Got a late start this morning, and I have work tonight and tomorrow, but gonna see what I can get done. Here is a screenshot:

I immediately  wanted to do a dark underwater game with dynamic lighting, so I went for that first. Not sure where to go from here. I am thinking about a sonar mechanic that pings the general direction of the net item, which lets you advance, metroidvania-style.

Only about 3 more hours to crunch today before I have to go to work