A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
Please delete that Scrawkblog link it's been deleted a few months ago.
It might be related to convert line endings I think
Actually you should start off by some other project like Mario 2d to get the basic idea of 2d and watch some tutorials on it I will be uploading...