Nice job. As far as graphics go, I've actually done some experimentation with attempting to build sprites aligned to a well defined grid using Gen AI. You can get surprisingly far by setting up an image of a cartesian grid where each cell can be thought of as a single pixel.
Once you down-sample using nearest neighbor all the lines disappear and you're left with more traditional pixel art 32x32 tiles.
Sweet! Have you had any luck with motion based ones, such as a character walking or an action sequence? That's where I've had the most issues.
Yeah character walking (and honestly any animation) is still a real pain. I've seen some people try to use video models almost like a rotoscoping tool but it always looks kind of sus honestly.
Maintaining consistency across a set of loopable frames still takes a fair amount of manual work. Here's an example I put together using controlnet and openpose.
https://mordenstar.com/other/hobbes-animation
That example actually looks really good!