That was really awesome! I really love the way you draw trees and those water color backgrounds. The creatures were well designed and charming, and there were some excellent action shots (him climbing on the 'fur monster' and jumping off was v well done).
This isn't necessarily a bad thing, but when voice over occurred in between long stretches of lovely animation and visual storytelling, it was often sort of jarring, and I feel like most of that vo could have been told with visuals alone (I did like the Monster's Voice a lot).
Anyway, great work! Best of luck with future projects, I'd love to see more!