Definitely an interesting game, though it's not really meaningfully adhering to theme. Still, great experience.
Viewing post in everything is fine jam comments
I felt the theme of "only one" was flexible enough to touch on ideas of isolation.
Also tried to play with the idea of one (obvious) choice, one color (red), one shape motif that isn't text (circles). Technically you also only use one button to play it, but that's sort of a cop-out.
That said - your milage may vary, I made the thing I was able to make.
Edit: Also I'm glad you liked it :)