2/ Go back out of the gate and blow the green dynamite up directly below you.

3/ Pick up the torch near the key at the top, then very quickly step, left, right three times, up, right and down.

4/ Get the key in the bottom right-hand corner then pick up the last torch in the middle.

5/ Blow up the dynamite under the two boulders, then get the chest on the way to the door.