Track 1: Seems like a sleepy lullaby? Is the prisoner still asleep for the title screen? :D
I like the tune, but the bells are a bit piercing on my headphones. They might benefit from a tiny bit of EQ to get the piercing frequencies tuned down a tad.
Hah, I love track 2. It's great. It has such a mischievous vibe to it. Really excellent.
Track 3 seems like a plot point alright. Cool tune. Quite dramatic.
Track 4 sounds like a cool level theme. Really dig the melody. A bit spy-like even.
Track 5 / Radio music sounds like some intermission in the game. Maybe the protagonist stops to listen to some radio while upgrading his gear or something? Like the use of vibrato in this one.
Track 6: Boss fight? Or just some really intense level. Excellent work on this one. It feels really gamey.
Track 7: Cool.
Overall, great soundtrack! Well done man!