Right I understand now. Thanks very much for your helpful feedback.. I will be back 

Well spotted! I didn't notice that stray pixel.

I drew the art at the pixel level, yeah, but the animation is indeed outside of the grid (though I didn't know this was against Pjoint's submission policy). I rendered the original art at 300% maginifaction, and then animated it at 100% magnification. Is this a bad practice in general?
 

Ah yes, the green specks are supposed to represent mould.. this is one of the earlier, more basic bows in the game :)