guys on lvl 5 - start off with a Pet shop, first rounds dont build any benches, news-stands, etc.
This is the order of the houses on my street: furniture shop, jewelry, pet shop, toy store, electro, food, boutique, mini market (some slower buildings in the beginning of the line is a must! jewelry, restaurant, mini market). I only build benches and a bus stop! No point in building the bus stop on day 5, i build it on day 9+, because the shops can't support the traffic so early.
check the green bars on top of the shoppers. it's the amount of money they have left. the less money they have at the finish line, the better.
i'm at lvl 14 now. if you develop a certain strategy you can use it in all the levels and finish the game! The only things that change in the levels is the amount of days and cash to be earned respectively. nothing else. so the same strategy works in all levels!!!
 "Shopping Street"){kind=icon}
 "Frontline Defense First Assault"){kind=icon}