Custom urls and MVC structure?

it has been almost 6 months since i started learning web development, i can tell that i'm proud of what i have been able to achieve after spending all that time learning. you can see a demo here (code source included) : https://www.youtube.com/watch?v=GQmvDDtNtpI i coded this project using (PHP, MYSQL, APACHE, CSS, HTML), i understand that php is not a language that forces you to use classes in order to make things run you can right code in any page and it will run but does it really matter if i used custom links instead of query strings? or following a specific structure such as MVC? or using config files like .htaccess?

thanks for your time.