You can see every thing in the game by running this code:

[Azure_Eyes]

First, make sure you have the Lua console open at the bottom. Then, run the code below in it. Courtesy of blocco. ^_^

[lua]n=0; repeat sleep(0.1) print(game:get(n), " - ", game:get(n).Parent) n=n+1; until game:get(n+1) == nil;[/lua]

So there ARE hidden objects...