The name of a strategy game?

There was a game where you had to build a ship to get small pink fluffy microbes back to their home. In order to do this, you could use blue microbes to protect the worker microbes that built the ship and also the pink ones. But the microbes sometimes get sick and die and you had to keep them alive while they built the ship. What was that game called?
Asked Nov 27, 2013

TIP: If it's not your answer to this question, please click "Leave a Comment" button under the question to communicate with the question owner.