The Menorah should have all the candle or wicks on the same level, none higher or lower than the others.
It is customary to have an additional candle (the shamash) with which to light the other candles and in order to use it’s light. The shamash should be placed in a way that shows that it is not one of the Chanukah candles.
From the OU (Orthodox Union):
The Chanukiah in an early scene of the rugrat’s Hannukah special has candles along a slope- not kosher.
ah, ok thank you! i appreciate the information