Defend your civilization against the impending doom!
A strange, ancient device has the power to do so, but it comes with a terrible price:
In order to power the cannons, a blood sacrifice must be made!

Try to survive 20 meteors and don’t forget: A lonely creature is not enough to keep the civilization alive!

The Needs of the Many Outweigh the Needs of the Few
— Spock in Star Trek II: The Wrath of Khan

Link to the entry:

http://ludumdare.com/compo/ludum-dare-36/?action=preview&uid=41148