Very nice game. I really like the base mechanics and how the characters interact with you and each other. Not sure how ambitious this would be, but I think it would be a really cool idea to allow npcs to come with you when venturing out once a certain affection has been reached. Your abilities would always depend on who's with you, and maybe there's room for special side events/discoveries that could affect your follower during the expedition depending on choices you make.
Also, at this point, I like how the game has really good pacing and doesn't feel like a grind. I think the amount of calories/meals needed for the next weight stage is appropriate. This could change if you add more content/stuff to do, but for what's available, I think its nice.
Lastly, I think the main character art could be further developed as previously mentioned. Overall, awesome game! I'll definitely be coming back to this one.