Rocks are randomly created during the generation of a level. They are 1x1 items that can be picked up by the Spelunker.
Rocks can be picked up by crouching while standing on them and pressing the Attack key. To throw, press the Attack Key again. If you hold the Up key while throwing, the rock will be thrown at a much taller angle. If you hold the Down key while throwing it will either drop to the floor in front of you or, if jumping, be flung at a downward angle. Thrown rocks deal 1 damage to Enemies, but can also hurt Damsels and the Spelunker, so it is advised to not throw the rock at a wall when close to it, as it can bounce back and deal damage. In this case, they deal 2 damage.