Thank you for an idea, I already knew about such tools, and I even do own one. But thing is, that those tools are used for animating vector characters , and they aren't suitable for low res. pixelated animations. So no easy way for me, but it's fun anyway.
Kartofel, that looks very nice! BTW it reminded me of the shader pipeline that was made by txesmi, take a look at this video: Ligths in the fog