WASD or Arrow Keys to move. 0 to open editor. Click on a block in the right to select it. Click in the left to place it. WASD or Arrow Keys to scroll around the blocks in the right, only if your mouse pointer is hovering the right. Try holding space while clicking and dragging placing blocks in the left to build trees, houses, exedra, really quick! In the editor, press 1, 2, and 3, to change the layers! 1 for main layer, 2 for building a thing over a thing, 3 to build things over the player! If you press the number of the layer you are already in, it will turn on onion skinning mode, where now you can tell if the blocks are in that layer or not. The faded out ones are the ones outside of the layer, the normal ones are the ones inside the layer.