Building: Movement - WASD / Arrows + Z Erase / Place mode switch - E Place Block - Click Change Block - Scroll Wheel / Click the Icon Play Test / Build mode switch - Space Playing: Movement - Arrows Run / Pick up Shell / Throw Fireball - (Hold) Z Jump - X / Up Arrow What to do: You can make a level and share the code, or find a level code to play someone else's level, in the forum topic in Notes.
Hold z to pick up the shell of the koopa, then throw it at the goombas DONT USE THE EDIT FEATURE
