If you want to change parts of the code you can look up the classes and id’s with tools like Firebug for Firefox or use the Inspect Element option in Chrome. Once you have the classes or id’s you can easily find the elements in the style.css file and adjust them to your liking. This way you can, for example, change the size of the navigation menu and the position of it.

Regarding the scrunched selections in the navigation menu, do you have a link to your website for me so I can have a look?

Cheers 🙂