Good job making an expansive and varied OST for your first jam! variety is important in my eyes, especially with longer entries like this.
Sometimes I think songs are a tad too long however. A world made of glass or queen Annabella for example don't change too much and as such begin to get tiring pretty fast.
I also think the battle track leaves a lot too be desired as it is too simplistic for a battle track. More syncopation, instruments, and changes throughout would help a ton.
Overall, I believe the main things to work on are variety within each track themselves. More instruments, changes in melody, and sometimes more bass as a few tracks are top heavy.
I did really like how Serenity of a Goddess transitioned directly into Farewell a world of glass. That was neat and made it feel like the song evolved which is what I want to happen in the middle of some of your other tracks.