I think you missed this part of the tutorial...
[quote:sh2ccbxr]Making monsters a little smarter
Right now the monsters just wander off the layout to the right. Let's make them a bit more interesting. First of all, let's start them at a random angle.
Condition: System -> On start of Layout
Action: Monster -> Set angle -> random(360)
Event 4 of the tutorial.
They will still wander off forever when they leave the layout, never to be seen again. Let's keep them inside. What we'll do is point them back at the player when they leave the layout. This does two things: they always stay within the layout, and if the player stands still, monsters come right for them!
Condition: Monster -> Is outside layout
Action: Monster -> Set angle toward position -> For X, Player.X - for Y, Player.Y.
Run the game. If you hang around for a while, you'll notice the monsters stay around the layout too, and they're going in all kinds of directions. It's hardly AI, but it'll do!