Shuriken Showdown - are you a ninja Time Waster?

Shuriken Showdown is a classic shooting physics game, where the object is to hit various targets. In this case, you must hit all of the targets first, clearing them, and then hit the gong. However, you have a limited number of shurikens (ninja stars) with which to do it.
There are also other objects that you can hit, such as one that gives you three more shurikens, and others that shoot out bullets that will break targets and hit the gong. Unfortunately, these are also considered targets, and even if you don't need their help, you must hit them before hitting the gong.
One challenge you'll run into is that your ninja can only face one direction on each level, and the range of motion of his arms limits him from throwing stars at targets that are behind him. He can arc throwing stars up and over behind him, but not straight out from the back, which can make some levels more difficult.
The game is nicely put together, and makes a solid coffee-break time waster