Nice to hear, I just completed the game and it was very fun, I really like the character's animations by the way.
Thank you! Congratulations, you solved all puzzles. I was afraid my puzzles was somewhat hard. Solutions was obvious for me (becoursce i've made them). Now i'm calm and happy :)
Btw, did you play in browser or mac version?
Browser.
Regarding difficulty I think that the incremental incorporation of the new characters and features prevents the game from being overwhelming.