The blog of the game developper who made the excellent The Triumph of Time : http://eriatic.wikidot.com/game:triumph

The Triumph of Time is a realtime puzzle/strategy game about defending space against an advancing cloud of antimatter. The original version of this game was done for the 14th Ludum Dare 48 hour game programming competition, where it placed 5th out of a good 120 entries. This is a greatly expanded version with a tutorial, more levels, more polish, and a level editor.

Extra map pack by your servitor: http://eriatic.wikidot.com/blog:triumph-mappack