I solved the whole pack.
I love the theme of the pack. Nice and cute levels

First half has open-ended levels so I don't think there're some serious backroutes.
My favourite level is "The Birth of Creativity". I think the level has pretty clever puzzle. I have a blocker left though.
Also I have some leftover skills for 8 and 10, so my solution is not 100% intended I think.
The hardest level for me was "The Jagged Staircase"
Replay attached!
