As to the SP vs MP, Q3A can do SP maps (see: lvlworld.com/t.php/canyafigureitout and lvlworld.com/t.php/poptart and lvlworld.com/t.php/Botulism and lvlworld.com/t.php/Skeet and lvlworld.com/t.php/Duck+Hunt ), but yes, sadly this map was designed as a MP, not a SP.
Gameplay is not so special because of the symmetry and crampedness, also there are some dead ends.
I wouldn't play it, but it's good for running around on a short nostalgia trip. 5/10