Super Mario World/Blue Switch Palace

Walkthrough

 * There are Spinies at the very top, and a blue and a silver P-Switch in front of you. First of all, collect all the coins that you can reach.
 * Now, stomp on the blue and silver P-Switch at once. The Spinies will drop down and turn into silver coins which you can collect for a 1-up.
 * Once you are done, go through the pipe and step on the blue switch. This will activate the blue switch blocks and give you an opportunity to save the game.