Sling.

In Sling. you must throw the projectiles at the enemies. The projectiles will accelerate towards your mouse pointer after clicking on them to pick them up. 

The game tracks and displays how many times you've picked up a projectile and how many times you've restarted a level - the game features around 30 levels with varying difficulity. As you progress through the game you will encounter new mechanics that you must master to conquer the levels and beat your friends high, or rather, low scores!