Because, like Purim, Hanukkah is not commanded in the Torah itself. See also:
Hanukkah is a holiday, not a show. Anyone can celebrate it.
It is customary to avoid time-consuming forms of work (such as sewing or car repair) during the first half-hour after lighting the candles. Other than that, Hanukkah doesn't have any behavioral restrictions.
Fasting is prohibited during Hanukkah (Talmud, Rosh Hashanah 18b).
During the first half-hour when the candles are burning, there is a custom (not a full prohibition) to refrain from work. Also, the light of the Hanukkah-menorah shouldn't be used for mundane purposes. Other than that, there are no prohibitions specific to Hanukkah.
חנוכה שמחSee also: More about Hanukkah
It is called a Hanukiah or a Hanukkah menorah.
Electric menorahs are considered decoration and can be lit with any number of candles at any given time; unless this is your main menorah, in which case it should be lit during Hanukkah, with the blessings, at or after sundown.
Hanukkah is the name of Hanukkah. In Hebrew it is spelled חֲנֻכָּה
Hanukkah is a holiday, not a person.
Hanukkah is the real name for Hanukkah. It can also be spelled Chanukah or ×—× ×•×›×”
Jewish people celebrate Hanukkah. (They are not called "Hanukkah people")
There is no Jewish tradition of eating tamales on Hanukkah.