The more gold the better. But at first, you have to grab it using your swinging hook and this isn’t the only unpleasant thing.
By touching the display you let the swinging hook for a trip for gold. The right timing and estimating isn’t everything. Some strategy is needed too and you cannot be sure that you always hit something. The shop is so very suitable for buying things which help. Use dynamite for breaking stones, liquor for increasing strength or buy a lucky plant. For reaching next levels you have to gain enough money, so think and don’t spend everything.