In Act II, where the monkeys are, there's a monkey sitting on a box on the right side. After I made him go away, I could push the box to the left or to the right. I didn't know at the time that I had to push it to the left so it would fall in the room below. I pushed it all the way to the right and now I am stuck. I can't move it to the left in order to progress. I can't go back to the point prior to when I pushed it to the right. I don't really want to restart the game from the beginning. Anyone had this problem? Is there a way to continue progressing through the game? A stupid mistake like this shouldn't prevent you from progressing.