I loved the description and drawings too! Amazing that you produced so many tracks in such a short span. Kudos!
Tracks 1-4 are well composed and great ambient music. That said, they each evoke a similar scene and mood. With that mood sustained for so long, it felt like a pretty sudden buildup of tension when track 5 quickly introduces drums and guitar. I could see that buildup being drawn out by making the previous track more tense.
I like that track 6 starts a little more intense. Rey and the Rocco have gotten some experience and things can't cool down now! I also loved the "tick tock" and panning percussion on beats 2 and 4 in the clock tower tracks. I imagine the fighting has caused some damage causing the clock to slow down in track 7. And I appreciated the sound effects and the Keeper's corny taunts in track 8 :)
The powertools and ratchets forming the beat in track 8 is really charming. I did feel this track was a short loop. The break in the middle is a helpful reprieve from the repetition. A suggestion would be to have more of these breaks.
Track 10 is creepy and forefoding, excellent!
I like track 11, particularly when the tempo cuts to half-time. Though, for a final boss battle, track 8 seems more intense by comparison—probably just a matter of instrument choice.
Track 12 offers an innocent tranquility, love the beep-y sounds. Harmony is restored between nature and the robots :)