Love style! (and mice)
Was going to complain about platforming in the scales-potion area, but I learned that you can hold jump and it will autojump and get on the scales easily. I like different mechanic for smelting minerals, gives a bit more variation in gameplay. Game is short, so it doesn't get repetitive and stays enjoyable all the way through. Everything was quite easy to understand.
Also crystal ball looks like it was placed there with a purpose, but never actually was given a use.
Good job!!