I love this!
What an excellent style you have - it makes watching this cartoon so much fun! The characters are engaging, the colours just right. Good storyboarding and nice humour as well.
There were a few small things I didn't like, the biggest one being the tree-jumping sequence. It seems like your inspiration for that was Adam Phillips' flash "Prowlies at the River", except that it's not pulled off nearly as well - something else might've been better maybe, like showing Zito clambering down from the tree that he's in.
I hope to see more from you in the future!