Just played the new demo, and I'm a huge fan! The levels are really well designed; they're difficult enough to be challenging, but never frustrating. There's collectibles that are more challenging to get, and I always felt like I had to grab them. Oh, and the minecart stages were so fun!
I also gotta give a shout out to the character designs! Everyone's so cute! My favorite is Clara the shopkeeper, I loved just talking to her until she ran out of stuff to say.
Anyways, great work on the new demo, I'm really excited to play more!