Since just barely finishing the jam on monday night I've been meaning to make a post to share my game, Vogon Constructors Ltd. I struggled with the theme initially, due to it being the sort that was more prescribing mechanics than offering prompt. But I had also wanted to tie in a little Hitchhikers Guide reference in honour of it being LD42, which is where the idea came about.

In VCL, you play as the Vogon Constructor Fleet and must destroy planets to make way for Hyperspace Bypasses. However, each planet is also producing resources; and the Bypasses themselves can only be between populated systems, so the idea was to be sacrificing systems in an ever shrinking "space" of usable nodes.
I was going to tackle this as a team but it ended up being just me. It turned out well, all things considered (I had social commitments and work, so it was far from a full burn). Please give it a go! It's probably not well balanced, but destroying the planets is fun.
https://ldjam.com/events/ludum-dare/42/vogon-constructors-ltd
Used lots of freebies and extras to support this!
- Fungus, for dialogs, is free and awesome: http://fungusgames.com/
- Space textures: https://www.solarsystemscope.com/textures/
- Planet texture generator: http://www.texturesforplanets.com/index.shtml
- Unify Community
- various others