Click on a grey square to build buildings to earn money and boost your score! Click existing buildings to sell them. Try to get as much money as possible and get the high score! You earn points for every building built. Better buildings give better score. The high score sometimes takes a while to update.. Don't worry, though, it will eventually catch up.
Adjusted the original project to use cloned sprites for the building spots. To keep track of what spot is selected you need to create a variable (spot number) which is "for this sprite only" and you change it before creating each new clone. This way each clone know what clone number it is and it can be used to differentiate between them.