Stall Catchers is an online game that anyone can play - no experience necessary. In the game, you look at movies from the brains of mice and try to identify vessels as flowing or stalled. This helps to speed up Alzheimer's disease research at Cornell University. Anyone 6 years old and up can play. The goal of Megathons all over the world is to have 100,000 players during the same hour, which will result in about 1 year of Alzheimer's research.