Super Mario Bros./Coin Rooms

Coin Room B

 * The last block, right above the pipe entrance, has 10 coins hidden inside.

Coin Room C

 * There is a power up hidden among the top row of bricks, just left of center.
 * To access the coins at the top, break the bottom two blocks in either the right most or left most columns.

Coin Room D

 * Super Mario can access the coins along the bottom just like regular Mario can. You just need a running start from the left, and push down to make Mario slide.

Coin Room E

 * The right most block above the pipe entrance has 10 coins hidden inside.
 * To access the coins above the bricks, jump on the right most block, and them jump left to cross the ceiling. Then fall to the right, in to the gap.

Coin Heaven C

 * The only difference between Coin Heaven B and C is the size of the platform that carries you through the area. Coin Heaven C's platform is shorter.

Swim Area B

 * The only difference between Swim Area A and B is the size of the platforms that fall through the water. Swim Area B's platforms are shorter.

Warp Zone

 * This is the Warp Zone that you access through the vine found in World 4-2. From here, you can warp to Worlds 6, 7, or 8.