Thank you for testing and the grammar corrections. The grammar is really a weak spot. :-).
Look closer at the screen. There are 4 ducklings, but you still find 5 treasures on it. It is not hidden in the screen, it is fully visible.
Added HELP command that shows hints in various places or situations. Try use it when you are really frustrated and can not progress. It is closer to a spoiler than a hint i quess.
MOVE, SHOW are used as verbs for buttons you think? Never seen it in that situation. Maybe i don't understand what you mean?
Each duckling has a specific trauma that must be solved by quessing the word. Food is required only on one duckling which you found. I can point out that the game tries to show some sort of love based solution to that kind of trauma for each duckling.