There's really a lot to love here, I think you did some awesome work. That said, i also think there are some things that need improvement. Starting with the audio, I don't really understand your choice in when to raise and lower the volume of the background music. It seems more or less random. Not all of the sounds are equally loud either, so the character's voice is just sometimes really quiet ("come on boy" for example). Once again, I think you should be a bit more careful in taking your frames so that you don't end up with sporadic spurts of choppiness. Just generally smoothing out the animation would improve this a lot. Also once again, I love the way you use fabrics, and the backgrounds this time around look really awesome! So great job there.
My favourite part in all of this is the general aesthetic and I really love the part where we first see the alien ship(?). It looks so cool, such an awesome visual affect.
So overall, really great job. work on that audio and the animation fluidity, and I can easily see you becoming one of the best. Good work, keep it up!