I have added a state from which the game starts and to where it returns on restart. The game start is represented with the character standing on the ground by the tower. To begin the player presses the screen which causes the character to jump onto the wall and start the ascent.
When the character is hit it falls down. When the player pushes “retry” objects are moved to give the impression of a descent along the tower, back to the ground where the character waits unharmed.