Here's an animation that shows how my Sokobubble game evolved over time. I wrote a devlog on itch.io where you can find a bit more background.

very cool gif! did you cut together a bunch of gifs made during your progress, or did you make a cart that iterated through all styles?

Thanks. Mostly the former. I pulled ten old versions from version control and generated animated gifs from each. Then a bit of cropping and scaling (as sprites changed size midway) followed by cherry-picking frames and stitching them together.

I was lucky that the very first level I created remained unchanged throughout the game's development. That saved me some effort in creating this animation.