Really good game! The only real issue I have (outside of the AI art, but I know commissioning artists takes money) is that once you finish with the larger goblin villages you really just... curbstomp everything. To the point the characters stop showing up entirely. I also don't know how intentional this is, but the shopkeeper started gaining frankly absurd amounts of height between visits (speaking of the shopkeeper, how often does she refresh? It was kinda inconsistent for me).
I know the game's still very early, but if you're taking suggestions I think characters (particularly NPCs) should have different dialogue relative to their growth stage, and (obviously) having more NPCs that grow as you progress is a good idea too. Maybe also a gallery? Once I got to the point I could kill everything in one hit, I just started forfeiting to see more enemy sprites, though that often just skipped straight to the final stage, and needing to make multiple playthroughs to see all of the growth stages, lest you go back and forth with the Narrator NPC to switch growth styles every time you go up a stage, is pretty annoying. All in all, still a solid game, though it's very early and could (obviously) use some improvement. Would love to see where you plan to take it!