Looks pretty good, actually. You clearly are pretty comfortable with the fundamentals of animation, especially as it applies to cut-out style animation.
The only real feedback I can offer is that if you want to work at a studio like Nickelodeon or Disney, you might want to make demo reels that match the style of the studio you’re applying to. You have a very unique art style, but unfortunately studios only seem to care if you can copy their style without plagiarizing them.