You should add replay value to this game by randomizing which items should be selected each play through.
The 10 "bars of gold" are neither bars nor gold (unless you mean white gold which makes no sense in a video game). You should tell the players they are looking for 10 silver coins. That would clear up a great deal of confusion.
Also, in the first puzzle it says to find scissors, but there is a second set in the background drawing.