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This is looking really nice, I was about to post some layout issues but seems like Gene has covered them all.
The only addition from my side would be to keep the consistency within the illustrations, e.g. the monkey character is outlined, opposite to the rest of the illutrations (hills, trees and so). I understand you may want the little fellow to pop, but it's already so cute and funny that there is no way it wouldn't even keeping the same style as the rest.
Other than that, great job.
PS: Just noticed, the colors look really nice and bright, but... seems they are RGB instead of CMYK. When printing they won't look that bright, you may want to see how it will really look. Please correct me if I'm wrong. Nicely done, though!