Go south to climb the ladder. Go north pass the white blocks and you will see a staircase. Ignore it, and instead go east and jump onto the pillar. Jump south , east, east, south onto the white pillar, then west, south, south, west, north, north, west, west, south, finally west to the treasure chest. It's a Meditation Rod. Jump all the way back to the staircase where you started hopping towards the treasure chest. Enter it.

Click here and see the map of Floor 5
Click here and see the map of outside

In floor 5, go all the way south and enter the door. You are outside again. Go south past the purple switch on the ground. You will see a bridge and a white block. Push it one step to the east onto the bridge. Now go back to the switch. Step on it and make the block fall.

Now, go cross the bridge. Follow the path to enter the door. Back inside, go north to the end, and face west to jump on a pillar. Jump west, north, west, west to the staircase that leading down. Enter.