To move the WASD keys are used, and in some modded versions the arrow keys work as well. The C key is used to attack with a weapon, break objects with the correct tool, and pick up certain entity tools like furnaces and chests and such with the pow glove or V in Minicraft Plus. The X key interacts with entity tools and opens the inventory. The Z key opens your personal crafting menu in Minicraft Plus and is not utilized in most other mods.