For some entries it is unclear what Lisp was used without further investigation. I think I'll amend the rules next time to make this a requirement.
I was thinking that to emphasize the lisp of lispGameJam, it would be attractive for the jam submission to specifically be the lisp source code written purely in the jam. And we could magic(5) the variety of lisp from the extension of the code submission. Itch.io supports source upload type. And the ten day window means there will never be too much original source per game.
Things like mine would be impossible to deploy that way, it’s all “put this Kawa code here, run this build script, modify these config files”. Code alone gets you maybe 50% to running state. Images, sounds, databases, etc. are non-source.
Most Schemes indistinguishably use .scm and some don’t allow shebang lines, so no “magic”; Chez is .ss and there’s a couple that use .s. Lisp I’ve seen .l, .lsp, and .lisp, and no extension (pre modern filesystems).