2/ Blow up the red dynamite, get the chest and then get the torch (this can be tricky. Stand under the trap that the torch is above and go quickly up twice, then quickly go left once and down twice).

3/ Get the key to let the balloon rise, then remove the end boulder and allow the next balloon to rise.

4/ Get the chest and the key, then blow the green dynamite up.

5/ You can then get the last two gems on the way to the door.