As a fellow Garageband user, I really appreciate how you created the clock sounds, they’re super spooky! And using the “ghost voices” synth was a great choice for creating your song’s ominous atmosphere. My favorite part is when the other piano melodies come in around 1:27, it feels climactic. The only thing I’d recommend for that part is to maybe pan the other two piano melodies left and right slightly, while keeping the primary melody in the center. I learned recently that this can help make the track seem more spread out, and it also keeps the melodies from overlapping too much. You could also play around with other processed piano instruments in GB and layer those with the Steinway to create more ambient sounds.
Great work! :)