Seacat is out for a dive!
I have been out of modding/gamedev for years now, and literally when I was about to delete my calendar reminder that LD is happening the next day I figured instead why not try and join in. As a result, together with NiceSlice we got a simple concept going and tried our best to finish things off in the 2-3 days. That didn't work out, but that's what the extra category is for!
So, click here for the adventures of a cat in a submarine: https://ldjam.com/events/ludum-dare/57/seacat

It's great to actually finish something, although I do feel like I overestimated my abilities - turns out all those years doing modding of existing games does not translate very well to figuring your own game from scratch (and tooling you're not familiar with), which was quite ego bruising in the end.