Mighty Bomb Jack/Stage 16

Section 1
The second to last Stage begins with a small challenge. There are two secrets that are available right at the start of the first section, including a Secret Coin. But these can be difficult to get to with enemies appearing as rapidly as they do. Since you need to be at the third level of power (green) to collect the coin, you will be safe for a little while after the enemies are turned to coins, but it's still risky. This should only be attempted if you are confident of your safety, or if you have only collected four Secret Coins until this point.