Minimal Tower Defense is a tower defense game (duh) where you try to defeat waves of Blobs before they reach your tower. Of course, its less of a tower and more of an orangish square on the right side of the screen, but the idea stands.

Blobs appear on the purple square on the far left edge of the map, and try to get to the yellow square on the right side of the map. Each time a Blob reaches the yellow square, you lose one life. Lose all of your lives and it's GG.