2/ Go back down to get the torch and go over the trap next to it to get the gem.

3/ Go up and get the gem, then go up to the top and over the trap for the chest.

4/ Go down before the dynamite, then right and up to get the key.

5/ Go back and blow the dynamite up and push the boulder once to the right.

6/ Get the gem in the middle, then go down and get the chest and the key.

7/ Push the boulder to the right once again, then go left, down, right and up to go over the trap to the door.