Could there be Individual Level speedruns, including a misc. category for solitaire? It seems to me that most other Zachtronics games on the website have most of their activity on people perfecting individual levels (Opus Magnum for example), that might be the best way for the game to see more activity.

lol I never got a notification for this

I don't mind setting up an ILs board for this if there's actually people interested. I personally don't care too much for ILs in any game, so I didn't set it up at first 'cause I didn't think anyone else would ever want to do runs of this anyway :P