Sometimes a single letter can change everything. It can affect the meaning of the word and alter the whole sense of the phrase. It can bring you closer to the end of the level or throw you down forcing you to start over. The outcome depends on whether you type it correctly or not! This thrilling puzzle will challenge you to walk up a winding staircase running into heaven. But you need to figure out the letter that should be entered into a respective box to move left or right. Without it, you won’t be able to continue your way. Good luck!