This is so dang creative, you did a good job of intuitively communicating the mechanics! The art for Henry is so cute it breaks my heart ;_; Poor lil baby. Thor is gonna love this for obvious reasons.
You said it's a prototype but it could definitely be a full game imo. I know what you mean about making a funky prototype rather than a finished game for your first game, that's exactly how I felt about mine (mine is my first published game too, and I told myself if I get a satisfying prototype it will be good enough!)