Throw a pickaxe to hit a gemstone and knock it down, then grab it with the wheelbarrow to collect it. But don't grab any stones, they are worth negative points. If you manage to grab the pickaxe with the wheelbarrow it isn't lost. Otherwise you lose one pickaxe per throw. Get enough gems and move on to the next level. Adjust the placement of the wheelbarrow and the strength and angle of the throw with the mouse.