Unfortunately this isn't a Laravel thing,
The code uses bootstrap alpha version and hand coded.
The CSS does not uses SASS or SCSS, its just a plain css file and if you want to change the color need to go and change every reference.
Wont allow you to install in local because valet does not reconize special path hardcode.
Has duplicated folders with capital letters and lowercase letters and if you install in linux the mess created its huge.
After seeing the code ill rather get the money back. this isn't a Laravel thing, only php.