The Moody Cube

This is a time-based shooting game. You have exactly 500 seconds to destroy 15 of 30 cubes hidden throughout the city. 
There are only three things working against you: time, not knowing where all the cubes are, and a moody cube.
When the moody cube gets upset and turns red, it hides some of the targets. But if you appease it by pressing its reset button, it unhides the targets and you stand a chance of winning. You win when you destroy all the targets within the allotted time.