To move, you can use the arrow keys or the WASD keys. press 0 to toggle in and out of editor mode. When your in editor mode, press 1 to cycle through nether blocks. (nether bricks, netherrack, nether quarts, nether gold ore, and nether portal. (Which does not do anything)), 2 for nature (dirt, stone, grass, bedrock, sand, and obsidian.) 3 for gems(diamond block, gold block, emerald block, and netherite block). 4 for building blocks(coin, top log, cobblestone, planks, glass, side log, and barrel. press up arrow, W or space to jump. Press jump to jump 2 blocks, hold jump to jump 5 blocks. Press E while hovering over a block in editor mode to use block picker. Press L to switch throu levels.
Thanks to Griffpatch to the awesome tutorial!!! :D