Counterintuitively, Christmas is a time where we have a lot of time to myself because the guy is absorbed with his puzzles and Lego, so I thought I'd take advantage of it by working on my vocoder more.
I got to the point at which I realized that the two versions come up with extremely different results for inverse square roots of the same near-zero values. I did some hacking to make the C++ version more like the pd version. It didn't help, and I felt really tired.
So, I went onto GOG and bought Noita, then got it running via Wine and got the Switch controller working with Ubuntu.
It's pretty cool, even though I'm sure it's running slow for me.
In the first 19 seconds of my second run, I blew myself up with a bomb wand, but also saw a subterranean passage when I went into the divot caused by the bomb.
Then, I used the bomb wand again to try to blow up a path down to the passage, but I didn't go far enough away when I threw a rock at my bomb and died.