I departed a bit from the project described in the lectures. In particular, the guessing part of the game play is spread across 3 scenes with different text and images for a bit of variety. I used a global object to preserve the game state between scenes — according to some references I checked, this is a Bad Thing and will cause the world to end. I couldn’t see any other way of doing it, though.
The little robot guy was made in Blender. He’ll get slightly angry if you give him conflicting information (like guessing a number outside the permitted range).
I hope you like it. Here’s the link: https://6hr.co.uk/unity2d/guessbot/
NOTE: I don’t know why, but you might have to click your browser’s reload button if the game doesn’t load straight away.