In the menu: 1. Press Play 2. Specify card size (slider) 3. Press "New World". In the world: Arrow keys to move, Space is Inventory. Click to place or replace blocks/objects. Tips: 1. If the world size is too big or small, then the game will not be started. You can recognise this by the Darker slider 2. On TurboWarp, you can make bigger Worlds without lagging
:)