You've certainly come a long way from when I first started watching your stuff, that's for sure. :)
Camera work and all that seems good, but from the animatic you sent to me a few months back, I'd say that the end joke read a little bit better.
In the animatic, the cat is flying towards DMA's heart, and he pulls out his claws as he steadily gets closer, implying malicious intent and explains why DMA is attacked internally.
While in this version, there is a better drawn and animated heart, we don't get to see the cat getting ready to slice, so it kinda seems like DMA randomly dies, with the clawing just implied as opposed to 'Uh oh, DMA is in for it now.'.
Aside from that, it all seems good except for the part where the cat says 'DMA...' right next to his ear, since it was a motion tween and all. :P
That all said, good stuff and it wouldn't take that much work to touch up if you ever revisited this in some form.
Keep it up dude!