Start the level, collect the mushroom, and then go hit the fire flower block and break the first block and get hit by the goomba, and collect the flower a few frames later, the goomba will go under you and can bounce off of it and go left and enter the pipe to go to the subworld, upon exiting turn left and jump to the bricks and run and look left 2 blocks away from the end get back into the overworld, and kill both goombas with your fireballs, and jump to first pixel and of the pipe before the stairs and do a pipe jump on the first pixel and let go of the d-pad or control pad and land on the first pixel of the brick and jump as soon you land on it and hold right 2 frames after. Contact me on the Super Mario Maker 3DS Speedrun discord.

Link to discord: http://discordapp.com/invite/2w6TCSC