A really well-rounded entry, congratulations! Top notch sprite work, animations, sound, and music. I feel like the gameplay could be slightly less punishing — perhaps introducing a couple of mid-level checkpoints would do the trick.
My biggest issue is probably the camera's implementation. For one, the movement is quite nervous. It could do with a Mario-style insensitivity window. Another thing is that the damping curve's long tail unfortunately highlights the low resolution in an unpleasant way.
Overall fantastic work, you should all feel proud!