Got all the way through the demo. Only had a couple persistent bugs.
1. getting damaged while using yoyo can cause crash.
2. Mushroom boss filling up whole board with mushrooms causes crash.
3. trying to open the character selection menu at save points when you have multiple special characters causes crashes maybe I collected to many characters. EDIT: Was caused by using second accessory slot and opening character selection.
Haven't been able to get 100% on forest or mushroom caves.
and did anyone find out to get to that one disconnected area in the mushroom caves. Thought it would just be an entrance from the restaurant but never managed to get in.
Love all the characters and can't wait for more.