Based on the arcade game of the same name.
There is the peril that people seem to drop just about anything out their windows at random times. Each card allows you to move to a particular position relative to where you currently are (for example, a choice of straight up two squares or up two squares and left or right one). However, there must be an open window that is not occupied by another player for it to be a legal move. Whenever a player passes certain checkpoints, the spinner is spun to see if anything falls from the windows. If you're hit on the head, you drop down to the next open window. There is also a gorilla that knocks you all the way down if you're unfortunate enough to be hit by him.
First one to get to the top of the building and escape on the helicopter wins.