Hindsight starts off as a relatively simple game. You press space to get your block moving up or release it to let it fall down, and you try to avoid the circles scattered about the level. The complications come in when you reach the other end of the level and switch directions only to find the path you just traveled is now littered with new dots. As you flip back and forth through the game's small area of play you gain points but the game's mechanic gets more intense as well. Before long you'll be leaving fairly solid paths that stick around almost indefinately; good luck!