Click the ghosts when they appear, and don't let any escape! Click the star to temporarily see through buildings! Also the background changes with the time of day, but you can press the spacebar to change it. If text appears behind the buildings at the start,press the green flag again. Global high score should work-if your score is higher than the global high score, it sets the global high score to your score.
Experiment with clones, ghost effects, getting progressively harder, and using the time of day
