Here are two completely free-to-use minor things I came up with. They're meant to complement a save as a utility rather than be part of it.

The free to use sign just indicates that a save is completely free to use. It has buttons that let you change whether people who use your work need to give credit or not (some people, such as myself, really don't care for credit much).

I've seen variations of stuff like this a lot, so I thought I'd come with with a general, standardized model. It's the classic settings indicator so people know whether to turn on deco, ambient heat, newtonian gravity, etc. There are buttons for turning a setting indicator from on to off which can be accessed with deco turned off. It comes with the most common default settings.

All creations shown here are mostly invulrnrable, but don't expect them to take any particular heat from nasty DRAY bombs or some stuff with DEST or BOMB. If you do need to shield them, just use a WALL - they're already rectangular, so it should be easy.