Games Like Shatter

Shoot the targets before they hit you. Simple. But you may find it harder than you expect. 

Use the mouse in over five different levels to watch your surroundings and shatter the ever increasing number of targets that will be positioned around the map, as they fly towards you, seeking to remove your three lives. Headphones are recommended due to the large benefit of directional sound present in the game. Each target is worth three points, but each bullet costs you one, can you reach the top of the leaderboard?

I estimate that the average player would take between 1-2 hours to reach the final level.

This is a Uni project that I have continued working on and is my fist game on Steam, so any and all feedback would be greatly appreciated :)