You did pretty well with that! Your visuals were creative, and you used a nice color pallet. I do have to say that the gradient in the background was unappealing. Liked how you had the constellation thing in the beginning too! But hey be careful, you don't want to fall into a habit of only animating Sleepycast. A lot of Animators nowadays will use other people as a crutch for their work (e.g people who only animate game grumps), and its a damn shame. I'd like to see you make some completely original stuff in the futuree, and with the guys from sleepycast as inspiration, it shouldn't be too hard.