Problems with installing a .unity file?

So you've downloaded my game and it doesn't work. Well, I'm here to help. If Iggy's_Sci-fi_Shooter.unity isn't working it is because you need to download unity. Once unity has been downloaded choose the import the .unity file. Great, you have done all of this and you found some bugs in my code, I'm glad you did and if you report it in the comments of my game I will try to solve this problem as soon as possible.