Hi Hob! As a fellow Construct 2 dev, I want to say well done on finishing the game. I really liked the concept, and it left a smile on my face.
There are a few improvements I can suggest to make the game better. As Keyb said earlier, letting the user press a button to move on text is definitely a good idea. To do this, just add the keyboard object in under "Add new object". Then in the event sheet, write "On key pressed (Space)", and add another condition. Then the second condition should be "If [NameOfText].text = [Previous piece of text]" Then the event should be "Set [NameOfText].text = [New piece of text]". Just do this for each line of text, and you're good.
The other thing is that you can use effects to embellish the graphics a bit. Don't worry if you're not a graphic designer (I'm not either). Adding in a flash of something when the creature at the end comes in would really make it more dramatic. Possibly a screen shake as well. If you're using the scrollto behaviour, just go to [Character]-[Shake] in the events.
Otherwise, I think you did a great job, and I can't wait to see how you progress in the future!