I love the creativity and the animation is really fluid. I think, though, that there is just too much going on in this video. You have some really great cycles: the ball that cracks open like and egg or the one that turns into a spiral as it bounces, and I think it would have been more impactful to see these slightly larger, so I could appreciate the detail more. Also, after cycle 30 or so, the video starts to get a little tedious. I think this would have been great as like 50 separate gifs or break it into a few videos.

Some of those balls weren't exactly bouncing... >o(
Overall, for what it is... great job.... :o)

Really cool way of practicing!
Might try this myself.

Really cool! I would have had the pacing pick up at around the second row, it started to feel too slow after you caught on the concept.

Good job!