Z key to jump / fly like in Hollow Night Arrow keys to move. Use your mouse scroll wheel to zoom in and out when editing the level. Drag with you mouse on the background to see different parts of the level. Drag on a level part to move it around, wile dragging a piece of a level press space to snap it to a 24x24 pixel grid. Press keys 1 key to ad a floor piece, press 2 key to add a platform.