A friend of mine just released his new game, Creeper World for the Mac and PC. He worked on another game a while back that was simple yet loads of fun. I’m expecting this one to be the same. I’m off to go give it a try now. From the FAQ: “Creeper World is a unique and fresh look at RTS, defense, puzzle, physics, and management based games.”
UPDATE: Ok, I must admit, Creeper World is fun. I just played through the first three levels and enjoyed it and I am NOT a strategy game fan. I will be playing the rest of the levels.