(disclaimer: AIM judge review here! these are just my opinions and thoughts, you can take from them whatever you like! music is subjective and all that. <3)
ooh, lots of familiar spooky tropes in your instrumentation... i like a lot of those choices, especially the music box in the opening section. there's some nice touches in the sound design too like the reversed bell and the low, growly rumbling. i like how you went for different degrees of fullness in the arrangement as the piece went by, too; the first part is more intimate but heavier strings, drums and brass make their way in towards the end. sounds like you had a lot of fun playing off the art you chose, which has that somewhat cartoonish spooky horror vibe that your music hits its target on.
a few things could be mixed a little more carefully i feel; a lot of the percussion is quite loud and you can even see where it's used in the overall waveform: bass drum, cymbal, tambourine. the oboe, too, even though it is meant to be the focus of its highlighted section, seems to stick out a bit. the release or reverb on the harp was also something i noticed near the beginning - since it's playing a lot of quick notes that are close by one another while the notes continue to ring, it comes across as a little bit muddy overall, maybe exacerbated by the harp sound itself not having a lot of attack to it.
with all that said though, there's a lot to love about this song and the mood feels just right to me. quirky, spooky, adventurous in the arranging, and with a good amount of playing towards established tropes (while still exploring new territory)!