(artist of game here.)(tip to finish game spoilers if you want to figure out yourself.) collect the three jars of fire fly's then make sure the last object you interact with is the bucket once you make a sand castle below the campfire you will find a spawned boat to left the ending will play after. interacting with anything that isn't the blue bucket after collecting 3 fireflies will prevent the ending. the only expectation from what i tested is pressing q in the bench where all 3 fireflies are gathered you get a small dialogue. hope you enjoy this small game we worked hard on it!