The level is called Queen of Board and created by DethMan. In distributions that include it, it is available in the Home Cooked Levels list, and accessed through the level named Ml_qobmenu (the first level is a "menu" level and you have to complete it before reaching the one you're talking about). This is a fan-made level included officially with some releases of the game. If yours does not include it, you can download it from J2O's archive of Jazz2City here.