Very basic, and not exactly easy, but it fails to keep the player's interest for very long. And contrary to what many other "commenters" may state, the lack of realism in it, eg Saying ow when an ant touches your shoe, loss of health for same reason, etc, doesn't really matter in a game, since it's, oh, I don't know, A GAME.
 "Ants Invasion"){kind=icon}
 "Raft Wars"){kind=icon}