The game is very addicting. I beat the highest of high scores. Not sure how long it will last tho.
There is a strategy where at the end you can slow down and move to a single direction and hostiles would just circle around you giving you more predictability and room to aim and hit targets.
One thing to note about the audio, it might be my laptop but the audio will start glitching out the more targets I hit. Very disturbing. Other than that, great game.