Developer: Increpare First released: November 25, 2011 Mac App Store release: June 22, 2012 Steam release: August 9, 2012
Intermittent problems launching the game on Retina MacBooks. Try disabling "Automatic Graphics Switching" in System Preferences > Power Saver if you experience issues. The developer is looking into it.
Increpare claim to have created nearly 200 freeware games to date. The deceptively named English Country Tune marks their first commercial release, with all that experience resulting in a minimalist puzzler.