Great job Joe! I like the core loop of shooting and finding ammo while having to strategize which colors to shoot. The timer really helps the sense of having to make quick decisions with what blocks to pop. Also, while the audio seemed a little basic to me at first, I appreciated the throwback to classic FPS games like Unreal with the announcer, as well as the satisfying soft pop noise that the colored boxes make as they are destroyed.
Additionally, I felt at first that I didn't have enough ammo but after a few rounds it seemed O.K. in order to maintain that constant motion.
With a little tighter movement and maybe a faster paced standard run, I could find myself playing many levels of a full game of this.