How do I change the amount of space there is between the form label and the field?

Go to your theme.css file. In Build 730 and higher, it should be located in:

/media/breezingforms/themes/*THEME_NAME*/theme.css

Look for: 

.bfQuickMode .bfInline .bfLabelLeft .bfElementGroupNoWrap

input[type='text']
{
     width: 48%;
}

You can change that percentage to whatever you want. (I changed the width in my forms to 22% which seemed to layout fairly nicely. Your mileage may vary...)