I am like you on referencing the walkthroughs, after those levels that you can't find out what you are supposed to do, and I agree with you on your game cheat beliefs.

I Believe cheats kill the spirit of accomplishment in games, and sometimes the purpose of the game itself.

I beat the game first, then use cheats but..... I do use walkthroughs when I am at the point of pulling my hair out because of a certain level (Then you figure out that it was the most simplest thing in the world... >.>)