The Space Game (http://www.thespacegame.org/) is an online crowdsourcing experiment where you are given as the role of a mission designer to seek for the best path to travel through space. The interactive game, coded in HTML5, challenges the players to devise fuel-efficient trajectories to various bodies of the Solar System via a user-friendly interface. The aim of the experiment is get people from all ages and backgrounds to come up with better strategies that can help improving the effectiveness of the current computer algorithms.
As part of the events organized world wide for the space week, the first problem of the game is to reach Jupiter with the lowest cost of propellant. The best scores by 10 October will be displayed on the Advanced Concepts Team website and the three best designs will also receive some ESA prizes.
Link to Original Source