The "pull the pin" game requires actual level design effort. You design 2000 puzzles and in 6 months the player's done with them all. Taking Bejeweled and pai

The "pull the pin" game requires actual level design effort. You design 2000 puzzles and in 6 months the player's done with them all. Taking Bejeweled and painting it a different colour can be done once and keep the user occupied indefinitely.