The demo was great! Really gave me those Paper Mario vibes. The one thing I would change from this demo would be where you respawn when you fall off an edge. Perhaps it'd be better if the game placed the player on the last safe surface they where standing on, as opposed to having a few checkpoints. I'm no game designer and don't know how hard that'd be to code, but there it is.
Anywat, the demo was very fun, and I loved the art style soo much! I can't wait to play the next demo and eventually purchase this game!