I've made a Donkey Kong coaching tool to assist people with the Springs stage. Hopefully it can help you improve. There's more information about it on my project page at
https://github.com/10yard/dkcoach#readme
The coach displays information as the springs are released and highlights the safe zones (green) and danger zones (red) so you can react quickly and learn how to spot the various spring types. Typically you need to make a quick decision based on the length of the spring being released "short" or "long".
As you become more confident with your gameplay, you can reduce help features by pressing "P2 Start" button. Toggling from "Max Help" to "Min Help" to "No Help".
Here's a quick demo video.
10yard2021-11-14 22:32:26