This is a game save file for Donkey Kong Land: New Colors Mode, a Game Boy Color-enhanced romhack of Donkey Kong Land by Specialagentape. The game has been cleared and all bonus barrels have been found. This file is not compatible with the original, monochrome version of Donkey Kong Land.
You can find the romhack itself right here: https://www.romhacking.net/hacks/6076/