Alright, let's break it down section by section.
The animation was pretty well done, pretty fluid. You stuck to the simplicity of the original Scribblenauts graphics, and that's a plus.
The voice acting was highly believable, and blended well with the scenes. I had very much pity for the townsman and his wife, and regarded Maxwell as the devil's ilk after watching this. Plus the choice of music! The Kill Bill whistle at the end was rather ominous, but rather fitting: I felt like killing Maxwell. If they say someone dies after that whistle, I think a lot of people watching this can say that Maxwell should be next.
The plot is a case of "that escalated quickly," in that Maxwell's misdeeds were piling one on top of the other, but *even the ending escalated quickly*. In fact, I'd say, rather abruptly. When watching things like these, the viewer WANTS to have the satisfaction of having Maxwell's misdeeds backfire at him somehow. What we were left with was a rather terrible cliffhanger which left a lot of unease inside.
In fact, might I add, the plot has come close to the *true* definition of "yaoi" -- "yama nashi, ochi nashi, imi nashi" (no peak, no denouement, no meaning). What we have is a shallow instance of "oh hey, I'm going to stroll down the town one day and cause mischief to one of my townspeople, and that's the end". Granted, everyone can imagine the kind of trouble one can wreak with that notebook, but surely some development could be added? Like, something beyond Maxwell's mischief making?
tl;dr: Fluid animation, excellent music choice and excellent voice acting. Plot, however, is seriously left wanting.