I have been using this tutorial to teach game design for several years and just noticed that, with the recent update in June 2024, that it is missing a step that was previously included.
When my students submitted their tutorial games this year, none of their games included the event where the goblins would pivot toward the player when the player got within 200 pixels of them (it was included when the game used to be a top-down alien shooter). I read back through the tutorial and sure enough, that step seems to have been left out of the most recent update.
You can see the in finished version of the game that is linked on the first page of the tutorial that it is still in the game, but there is no step in the tutorial itself that describes this event.
I wonder if it would be possible to add it to the tutorial again? It strikes me as an important part of the AI of the enemy to make it a much more interesting game!