Looks like one of those mini computer games.

You are a digger driver demolishing a high rise building. You have to dig to ground level, without falling off or collapsing the tower, before your opponent. You extra win points if you can knock your opponent off.

Silly old Daily Wail - the heading for the article asks "How did they get up there?" then the opening line of the article says the excavators were hauled to the top by cranes! Presumably the cranes were of the mechanical variety rather than the ornithological variety! Perhaps I'm being picky in suggesting that cranes hoist or lift rather than haul. Hauling in this context suggests a mental image of a massed cohort of tug-of-war teams pulling the excavators up by means of ropes slung over the tops of the buildings. Also, if the rubble/pieces created during the work get pushed over the sides of the buildings from time to time, hopefully the people on the ground nearby are all wearing their hard hats!

On a more serious note, I wonder why demolition of the buildings by an expert company using controlled explosives wasn't used as a safer and much quicker method. However, perhaps I'm misled in this thinking by having seen TV documentaries of (successful) demolitions of large complex buildings in this manner.

p.s. I've noticed that the blurb under my name at the side of my responses has changed recently to categorise me now as a "super forum user". Though this forum isn't bad, surely it doesn't rank as super! If the word super pertains to me, it's a nonsense because it merely reflects the fact that I've made more than a certain number of postings and responses on this forum and is no reflection on the quality or otherwise of my offerings. Therefore, please can I be reverted promptly to "forum user"? One reason for this is that if my boss happens to see this revised designation, he might accuse me of spending too much time on this forum.