Thanks for the reply!
Upgrades only boost your skills a little by a little (like +3 health point per campfire level) which is a very little amount, we want to avoid the fact of farming forest area and upgrades all items in order to reach other areas. That why they are pretty unbalanced.
Due to lack of time we do not have time to put musics in the game (we have them though).
I understand, but here again it was done like this because of lack of time.