I thought this was great! You had the best clay blood I've ever seen, and I really liked the visual style throughout. The sound design was good too. I was also impressed with the lack of flicker, you had it in some places, but that's expected due to where you were filming.
I think it's a great short, but would love to see your style in a longer, maybe story driven brickflim. You could really do some neat things. The way you had the drawn effects for emotion reminded me of Scott Pilgrim vs the World by Edgar Wright, one of my favorite directors.
P.S. loved the animation on the kid channels and had to subscribe there as well. Welcome to the forums!