The mobile version (often the 2019 or later editions) restores the original "taste" of the childhood game with updated touch controls and pathfinding.
If a separate OBB file was provided, use a file manager to move the folder (e.g., com.mtclassic.yfsgame ) to Internal Storage > Android > obb . Launch Game: Open the app and begin your climb.
Success requires calculating the "cost" of every battle in terms of HP loss.