Using Slick2D means we need extra stuff
Slick 2D includes files that lets your computer interact with Open GL and the operating system, which is what helps it run fast. These files are called natives. We'll need to use a program called Jarsplice to combine our Runnable Jar with the natives to make something called a Fat Jar which contains everything we need.
Extra Step @ School
So to run a jar file, you will need to have Java installed on the machine. However, BCPS has decided to not allow us to have Java on our computers. Madness. This means we'll have to use an extra program just to open Jarsplice and our final products.
The file above contained Portable Java Launcher. You simply click on that executable then use it to find Jarsplice and load it up. You should see a program that looks like the screenshot on the right.