Above.
I have Unity working on Linux on my Chromebox finally, and about 4 months ago I successfully created and built the Karting Microgame for Android.
I found the Ruby’s Adventure tutorial on the website last week, so I’m going to print out the steps and try and do it over the next couple of weeks while the whole family’s in isolation due to Dad’s eye op.
Good luck!
Well I spent most of last night doing the tutorial, managed more than half of it and then had to give up because the scripts didn’t work.
Keep us posted! You’ll want to post any script errors either in the Scripting forum or the thread below (depending on your errors). Hopefully your Google skills found these https://issuetracker.unity3d.com/issues/rubys-adventure-2d-beginner-project-scene-view-is-in-3d-orientation-instead-of-2d and https://forum.unity.com/threads/rubys-adventure-2d-beginner-official-thread.661837
Dont bother its broken and makes me doubt unity learn in its entirety
Not helpful but thanks anyway for your input 
So I played the complete game earlier (not my own creation), how do you kill the enemies?
Ruby throws cogs at the broken robots to fix them. To launch a cog, press key C on your keyboard.