Totally forgot I signed up for this :)
I'm using https://github.com/arcadia-unity/Arcadia which is the integration of CLR clojure with the Unity game engine.
I just finished a rewrite of a tween library https://github.com/selfsame/tween and have been itching to take it for a spin.
As for the game, It will be a simple shooter where you fly on the surface of arbitrary meshes (think mario galaxy with old school scrolling shooter gameplay)
I might stream some dev on twitch - will post an update if so :)