Fans of Marble Madness and Super Monkey Ball will probably feel right at home with Mercury, one of the first efforts to come from Ignition Entertainment for the PSP. The game lets you take control of liquid balls in outer space as you roll your way through a number of puzzles, completing tasks and avoiding obstacles as you go. Taking too long to complete a puzzle will result in your liquid ball freezing up. The game features some sweet animation and plenty of puzzles to complete, so grab your PSP and roll around for awhile.