Arrow keys to move, Z and X to change blocks, C to erase blocks, and Space to place blocks! Use Q or A to zoom.
Builder's Tips(scroll down for more): Text boxes will work the same whether you actually walk into them or not, so you can place a collision block on top of a text box. You can overlap blocks. You can only use up to 300 blocks in the regular scratch editor. Teleport blocks will only work when you actively walk into them, to if you teleport onto one, nothing will happen until you walk off of and onto the teleport.
