Let's make "NumberOfFinishedLevels" global variable
at the begining it is "0" (coz no levels finished)
on levels even sheets:
when first level finished System "add" value 1 to "NumberOfFinishedLevels" = so it has "1" now
when second level finished System "add" value 1 to "NumberOfFinishedLevels", so it has "2" now
when third level finished System "add" value 1 to
"NumberOfFinishedLevels", so it has "3" now
on menu eventsheet
if "NumberOfFinishedLevels" = 1 then i.e. make visible image of goat (near 1)
if "NumberOfFinishedLevels" = 2 then i.e. make visible image of goat (near 1) and i.e. cow (near 2)
if "NumberOfFinishedLevels" = 3 then i.e. make visible image of goat (near 1), and cow (near 2) and duck (near 3)
and so on