Or something more simple like a to do list in which appears some help (not directly saying you what to do) by spending objects that don't have many uses(only getting hints of the places you have available at the moment). If you've already gotten everything instead of a hint you would get a thing writen by you (maybe multiple). something like "gueass who's the clown that just wasted some materials" or "you know that you already have everything, right?".