CREATE TABLE table_68981 ("Title" TEXT, "Year" FLOAT, "Developer" TEXT, "Publisher" TEXT, "Players per Console" TEXT, "Genre" TEXT)

Which Genre was published by Atari and developed by NuFX in 1991?
SELECT "Genre" FROM table_68981 WHERE "Publisher" = 'atari' AND "Year" = '1991' AND "Developer" = 'nufx'
SELECT "Genre" FROM "table_68981" WHERE "Developer" = 'nufx' AND "Publisher" = 'atari' AND "Year" = '1991'