Thank you! I think I will have to disappoint you because there is no ending currently (we ran out of time). We originally planned a reunion with all of the saved spirits inside the cottage, drinking hot chocolate and relaxing by the fire before the winter sleep.
There are 4 levels of raising difficulty so you can consider yourself beating the game! Puzzles are procedurally generated, so each time you play the spirit colors and their neighbor preferences are unique. Sorry for leading you on!