I never got to play the original Donkey Kong 94, so I've been having the time of my life with it on VC. I thought it would be great to discuss, especially since there is really no instructional manual and there are just so many undocumented features.
For example: I was stuck on 7-10 for the longest time, until I finally realized: The temporarily ladders are on a timer, BUT, the timer resets each time you start a new ladder or floor. So if you start one ladder, then race across the level and hit another temporary ladder, then you've just effectively reset the timer, so the first temporary ladder will now last longer. Technically, if you had a level that had a series of temporary ladders and floors one after another, then you can keep those going indefinitely. The timer just will never run out.