Clojure and Scala are both there, except on idiomatic libraries (you might have to use Java libraries).
Clojure wins on simplicity of syntax (Scala has a rule that operators ending with ':' associated to the right, which makes an incredible amount of sense once you understand the language but is annoying and arbitrary to beginners) and homoiconicity. Scala wins on pattern matching and robustness (static typing). I'd use Scala for a game, because it's fast (both in terms of human and CPU performance). Both are great languages.
Because Clojure is a Lisp we have macros and with macros comes a lot of power. Clojure has a full powered pattern matching library. See this: https://github.com/clojure/core.match
Clojure wins on simplicity of syntax (Scala has a rule that operators ending with ':' associated to the right, which makes an incredible amount of sense once you understand the language but is annoying and arbitrary to beginners) and homoiconicity. Scala wins on pattern matching and robustness (static typing). I'd use Scala for a game, because it's fast (both in terms of human and CPU performance). Both are great languages.