help needed a little confused on gamemanager unity 3d 2018

[jphibbard]

IM HOPING I COULD GET HELP HERE BECAUSE PEOPLE SKIPED MY POST IN THE OFF TOPIC FORUMS IF THIS IS NOT THE PLACE IM SORRY BECAUSE I DONT KNOW WERE ELSE TO GO FOR HELP

so i followed this tutorial exactaly and it worked for him but i get 43 errors in unity and 100 in visual studio

any help would be apreciated as im new to coding with unitys new scripting system

not the old scripting format i know that

tutorial link

https://www.youtube.com/watch?v=oV0YHO510Os


name of script: GameManager.cs

https://drive.google.com/file/d/1dLeqCZk02im2kIz0_hn0HLdEYFUFetGJ/view?usp=sharing