Watch the Level 3: Beginner Classical online guitar lesson by Andrew Leonard from Take 5: Beginner Classical
As I play "Kemp's Jig", listen for the "jig groove." This piece requires playing in time and not varying your tempo. Imagine yourself playing "Kemp's Jig" on a lute in a Renaissance dance hall while people danced.
One of my favorite things about being a classical guitarist is the opportunity to play pieces from many different periods of time, in many different styles. Each period and style requires different needs. Understanding stylistic differences will help you bring the music to life. For example, if this was a jig written during the Romantic era (19th century) it would most likely be a stylized version not intended for actual dancing, but for listening. Thus, you could be a little freer in your rhythm.