There sould have been a text box appearing triggering the end screen once you put the bear next to the fire and press B, however I think if you place it exactly on the fire, the text box never appears. It's one of the area where I wish I telegraphed what to do a bit more.
For the cookie counter, I couldn't figure out a way to have the UI in a non intrusive manner and like, the next day post submission, an idea came into my head. Sadly too late haha. But you are right, this is needed especially for the latter levels.
Thanks for the feedback and the pics ! I only had a Vita homebrew to try it out and it fill me with joy seeing the game run on a yellow GBC (like the one I had when I was a kid haha).