Wish Delivery: This is such a fun main theme for the game you describe! The melody is catchy and intricate over a relatively simple two-chord progression. I like the trade-off between the two main melody parts and how both have unique and interesting lines. I especially like the grace notes used toward the end of some phrases in the melody line.
Something is Wrong: You have great pacing in this song that seems to have a more complex repeat pattern than a simple AB. While the tone is darker in this piece than the first, I would say that the mood conveyed is kind of like one of searching for something lost (after reading your description, I realized that this is exactly what you were going for- so great job conveying that feeling musically!). My favorite part is the B section where you have the interlude of the bagpipe-like instrument that interjects with the rich chords underneath.
(I am Not) Ready: This theme fits the cute game you’ve been describing where the main character is doubting themselves. I am not sure I get high enough energy levels usually needed for a boss battle, but this definitely works for the emotional content leading right up to the final battle in my opinion. I do think the booming sound effects do help convey the gravity of the situation though.
Everyone Can Wish: This track has the soothing calmness and celebratory nature that fits very well in the end credits spot in a game. The bass pedal tone is really interesting in that it stays constant the whole time, but you vary the harmony around it giving it different harmonic functions in a way that makes it feel dynamic even though it literally does not change at all. This was a fun soundtrack and a fantastic idea for a small game that I think needs to be made into a real handheld game! Great work and thank you for sharing!