Little Nemo: The Dream Master/Dream 1: Mushroom Forest

Key locations

 * 1) Above the second blue mushroom
 * 2) Above the fourth blue mushroom
 * 3) Above the giant red mushroom
 * 4) Underneath the mole.
 * 5) Underneath and left of the mole.
 * 6) At the top-right corner of the waterfall.

1-up locations

 * After meeting the Mole, and collecting the two keys, continue left through the dirt. Continue digging left until you can dig down through the bottom of the screen. This brings you to a cavern where you can collect a 1-up and a lizard.
 * After crossing the waterfall, look for a lizard, and ride him to the top-right of the waterfall. Jump across and grab the left-hand wall, and climb to the top for a 1-up.