Now the resources are spread densely across the playing area. I need to add a couple more, but the first 3 look good. I used 7 loci to spawn from, so that all starting areas have resources. And I now know how to control that to get other distributions, including voids. So if someone wants a challenge, it can be that.
I should add a power challenge mode. That's where you can't save the game, and must have a UPS attached, and backup power, for the game may last for days by re-spawning resources.