My game is two players that have to move their boats out of the way of obstacles.

The challenges that the players face are obstacles. The aspects of the original game that I didn't include are water, and tracks. Players cannot do anything to affect each other. The game does not have very much replay value because it has no change what so ever. The game is fair. The essence of the game is that the player must maneuver a boat around obstacles.

I don't know what the rules of the original game are. I did not include and such. I'm not what the essence of the original is.