Being a Donkey Kong owner this is the question im asked upon every level i play however I have no clue what that screen means. What is the 25m, 50m, etc really mean?
How far up on the building you are. It eventually goes up to 150M if you can play long enough (Level 5 onwards). When you clear the rivet level, remember Kong falls. He's supposed to be falling back to the bottom and you start over again at 25M.