WASD or arrows to move, pick axe points at mouse pointer, space to go deeper, E to hide in your minecart (you have to be close to it) Travel through the strange terrain in the cave and mine crystals with your pick axe and put them in your minecart, then take it to the sell area. Make sure not to get caught by a monster. Either hide in your cart or go deeper - but which one for which monster? ( it's coming when you hear the 'stclikcilk' sound). (if a gem is breathing don't hit it or else...) (when you hear a strange noise, go deeper immediately).
