I might add difficulty modes eventually (as some people want the game harder, and some want it easier), but I think the current balance is pretty good overall. And I might add more to farming - as right now you just have to wait (and maybe apply fertilizer). Perhaps a watering can would make crops grow faster, so players who care will spend time on the farm, those who don't will mine and when they return have some free food even though it took longer to grow.