Features added in rough order:

1) New tileset for Mossy turf, as well as brick tiles darkened.

2) Different footstep sounds for different materials. (this video showcases more features too)

3) Added ambient tracks to the music player system.

4) New layering system, taking advantage of Construct 3's new sub-layers!

5) Added forced dialogue. If you walk into a trigger, it'll force you to see it.

a.) Also added dialogues being permanently one timer. If you do it and walk off, it's gone.

6) Added kill planes

7) Figured out timelines in Construct 3

8) Made the blonde fairy actually blonde.

9) Added an industrial tileset for future levels.

And a fun personal anecdote. I spent an hour trying to fix an issue with the dialogue that turned out to not even be there. I just forgot to change a number from 3 to 4.