Last weekend was Global GameJam. My buddy Crispin suggested we use Clojure, a non-traditional member of the LISP family running on the Java virtual machine, and its browser-friendly cousin ClojureScript.
Here is the game we built together, using graphics from Kenney.nl:
You can find the source code on GitHub.
A couple of weeks ago I installed Leiningen, the Clojure package/dependency manager, and the VIM plugins, and started practicing.
Literally every night for two weeks now I have been dreaming in parentheses. Writing code has never felt so comfortable. I think I may officially be a LISP convert.