Alright, I've finished a trailer: https://goblinrefuge.com/mediagoblin/u/onpon4/m/retux-trailer/
I'd appreciate any feedback on what's shown here. I might make an improved version with a better selection of clips.
Also edited http://retux.nongnu.org to list some of ReTux's particular distinctions (the same ones the IGG campaign listed). I'd appreciate feedback on that as well (especially regarding anything I missed).
