Pretty Good
The animation is and the character designs, the storyline, not so great. Telling Satan to spread love? Wow... Everybody (except for some stupid people) hates Satan because he kills children with diseases and tempts people to hurt each other other. Not 'cause he's red with horns. Wait, this is a cartoon, why am I even going into all this. Nevermind.
Bottom line, the fight was a lil lazy because of the overuse of "fillers" like close-ups, silouhettes, shadow fights, etc... I should know, I used to use those all the time. But the character design was cool and it the concept of Santa v. Satan was original so 7/10. Peace! Keep up the good work!