Two new tools were added to Lode Runner 2 this week which should help speed up the level making process.
This one is pretty simple... toggle the button to play animations within the editor.
This will allow you to see and get a feel for the level while you are actually creating it.
As with the Original, you can hold down X, Y, or Z to constrain the mouse to one of those axes. When Reveal is active, this will also cutaway the level to reveal what's behind. Since Lode Runner 2's levels are isometric, mostly being built from the back to front makes it harder to then go back and make an edit.
Like the video shows, mouse picking is still available when Reveal is active. This makes it easy to make tunnels like I did or access areas that you otherwise would have to delete to get to.