Inverse Crescent. You are drawn by a gradually increasing force towards MC. The measurement of the force (which we will call "Pull") is basically -LV, but it does not increase at a uniform rate. This is probably due to quantum. (The technical specialists among us can expand on this.) Periodic announcements on the current level of Pull will be made by Mission Control. The aim is to resist the increasing attraction to MC as long as possible. The higher your LV away from MC, the longer you can resist, but if your LV becomes greater than 186,000, then you break free of Pull altogether and spin off into outer wotsit, ending up god knows where. The first person to arrive at MC, obviously, loses the game.
[Snagandorf] I fear you will find yourself caught in a perpetual motion loop, playing off the Dollis Hill effect against the Pull, but that's your lookout. I'm starting at West Ruislip to build up the LV to at least 2,750 along the Central Line to swoop close to the centre of the Black Hole for a closer look. Geronimo!!!!!!
Borough, with LV as high as I can manage at this stage, which is 18.21. The reasoning being that, by starting on the Bank branch of the Northern line, I'll hurtle through Camden Town with hardly a hesitation and end up further away than I started. Home at Devons Road to provide an additional spectral pull.