Room for improvement
First of all, good job. The animation was impressive and the main character is intriguing.
Now, some constructive criticism:
The different plot elements all felt inspired from other stories, which had been mashed together to make a storyline that was hard to follow. I was unsure why Miles was trying to defeat the robots who were hunting the monsters. I expect it would be explained in a longer version of the story, but for me watching this, Miles was some dumb kid trying to be a vigilante for no reason. I found Solar City to be very dark and, well, not very 'solar'. Unless you were going for this, then I would suggest either changing the name or the weather :)
Wasn't sure how it was raining inside, anyway.
There are a couple other things that I could mention, but I won't, as they only improve with time and experience.
I thought the music-muscle functions idea is interesting and I would like to see it develop. The pause and play on his glasses was a clever idea, and I want his blue shoes :D
Hope to see a more 'tidy' upgrade to this sometime in the future. Till then, good luck!