I really liked the idea of the one big bullet that does a million thing :)

Reminds me of that Wii tanks game from back in the day. I beat it in one sitting, but the way that power ups are given out, it still has replay value to see what the other power ups were like.  speaking of power ups, every one I got felt game changing, but was balanced by the number of enemies/their power ups. Also, I loved how the ammo mechanic forces the player to get out of safe zones and make every shot count. Overall a very fun and smooth experience.

Wonderful and definitely worth anyone's time to sit and play for a spell. :)