The image is cute, but suffers from one serious violation in pixel art. In pixel graphics, these kinds of spikes (protruding corners/steps if you don't understand what I'm talking about) are not very popular, and they are usually avoided by any cost, and are considered as rookie mistakes. As you reduce or enlarge your images in the future and get results like this, it would be advisable to fix those steps. This time we will approve it, but please try to learn more about pixel art and its rules, what makes it pixel art and what doesn't. You're on the right track, you just need to know a little more about the rules of "the game".
Thanks for the feedback. I appreciate the critique and understand the issue with jaggies and spikes better now. I’ll focus more on cleanup, cluster control, and cleaner silhouettes in future work.