This game has a lot of potential and the art is very good! I have a few suggestions that might enhance the experience:
- If you plan on adding more stages, going for intermediairy sizes rather thant bigger ones (although I wouldn't mind) could give a smoother transition (like 1 to 3 inbetween),
- Similarly, I think the "empty" size could be flatter/skinnier (the current "empty" size could become size 1 or 2),
- Why not add an "overflow" state indicating when storage is full/overflowing, she then would start "lactating" mana (be it just stains or full-on leaking),
- For a moment, I expected different mana types to affect different parts of the body (at least as a secondary effect), like red for hips and green for belly (because it makes "life" potions, get it?), maybe by combining several mana types?
- An easy access to money would be nice, rather than having to try to buy things to see the amount.
That's it for me, for now! I'm excited to see the evolution of this project, maybe with some more story/lore/interactions developments?