It is a simple Python game. Your lemmings (balls) are running around. Keep them from dying (when they fall into square holes). Click on Holes to temporarily cover them.
For runnning you need the kivy library and python3.
Sounds from: (CC-by-SA) http://www.freesound.org/people/Robinhood76/sounds/64425/ http://www.freesound.org/people/mikaelfernstrom/sounds/68695/ http://www.freesound.org/people/marionagm90/sounds/220660/