Space shooter

Hello i no this has proberly been answered but i cant find it, im doing this tutorial on the latest version of unity and i cant seem to get the scoring to work can somebody plz help, im using c# scripts.

If you are doing the Space Shooter tutorial series made by Unity Technologies, you will need to make sure you are using the proper version of Unity 3D. Also, you can download everything you need for the project from the Unity Asset Store. Once the assets have been imported, you can just use the scripts that come with the asset. You could also copy and paste the data from the tutorial page.
Hope it help!
Calvin