If you don't beat it you can still go see Teeth (for me I couldn't find out how to get back to the other side so I just went up) and Artemis befriends her. I'm guessing you get the same dialogue except you miss that interaction where she gets happy
ok im a little late but, wow i loved this?!! like pretty much everything about it was amazing (and it's only the demo???). I'm definitely buying when it comes out :))