Not to repeat your words back at you, but it just sounds like an exisiting game soundtrack, it's all so complete! Even without the recurring themes it all sounds so coherent! The tracks are very dynamic and exciting without getting in the way of (imagined) gameplay. The grand finale was fantastic!
Honestly you did so much that it's hard to judge as a whole (funny coming from me haha), but it's all really well done and polished.
I listened through a couple times to really get a good idea, sorry I didn't have as much feedback as you gave me! A good sign I hope! I'll make sure to keep an eye out for whatever you work on next!