Basically no time to think through a strategy for many levels - just click like crazy. After you memorize the 'cost' of blocks (like patching a hole) it is easier as you get no indication that you have enough items unless you click on on the block.
The storyline was fine. I liked the idea, but the levels were too easy - I only had to play 1 level a second time to make the time. Graphics not well thought-out: the characters kept running through the trains. And why are letters appearing all over the place with money in them? No rationale for this. Game is good for beginners.