Edit: Released a patch to fix the steps bug.
- added ceiling light, medium and large signs
- fixed the double placement bug with floors
- added "extend" mode that adds extra walls or foundations by an amount when placing
- added an exit check to prevent sadness
- the sentry now has a "laser halo" and can be placed on shelves
- swapped inner/outer tier colors for frames
- doorways now use a box collider (can't click through)
Much to do already and now lots of new Rust items to add.