this is a 3d starter you can build anything of of it. to add more squares/triangles/any shape you want press 0 then go to the position you want the first corner to be and press space then add the x, y and z when it asks you the x y and z And the type (please add G for the type as to not destroy the entire project) to get out of editor mode press 0 again.
more coming soon such as player death switching levels and bouncy platforms, and maybe mobile mode. for movement arrow keys for looking up, down and left right. wasd for strafing and moving back and forwards space to jump. when you enter editor mode the space button is used for something else so use the up and down arrow keys to look up and down.