Collision on Brackeys Game Tutorial

Flawful

heyhey! I am a brand new game developer and following the brackeys c# tutorial and the how to make a game tutorial, im stuck on the part of collision where when I click play, it still registers the ground as an obstacle, ive followed the video all the way through and even have the tags set to the obstacles, but for some reason it just doesnt wanna work, and I dont know what to google for, any help would be appreciated!!