I think you're off to a good start! I like the children's book feel of your mini series! My biggest critique, and it looks like you've already fixed it in your newest comic, is all the white unfilled areas around your outlines. But again it looks like it's been fixed on your newest comic, so keep up whatever you changed on that one!
Also, not too often, but every now and then your text gets a little too close to the characters. Make sure they have enough space to breath, and aren't overlapping with any of the characters outlines.
I like the character designs, especially your vulture character. Keep up the good work!