game:load(ID) works for your own games that way. It'll open in Editor mode instead of Play mode if you made it.
So, you open up the Lua bar, type "game:load(theIdnumberofyourgamegoeshere)" and then you can work on it.
So, you open up the Lua bar, type "game:load(theIdnumberofyourgamegoeshere)" and then you can work on it.