2/ Get the gem at the top and then get the gem in the bottom right-hand corner.
3/ Remove the block under the green dynamite on the left-hand side and then remove the block next to it to let the boulder fall.
4/ Remove the block from above the dynamite, then stand on the green & purple button and quickly move up/ down and right to let the boulders drop.
5/ Get the key and then get the gems at the bottom. (Watch out for the falling boulders).
6/ Go to the two white boulders in the top left-hand corner, push the top one to the left and then push the other one to the left.
7/ Get the chest and the key, then get a torch.