I like the idea and the implementation was certainly fun. The instructions could use more work. I'm certain I've read everything yet somehow I felt like I didn't retain anything and had to learn the game from scratch. That is not so bad because the sorting job was simple enough and the game controls could be picked up in a minute or so.
What tripped me up the most was that the shot always hit. It was so small and linear that I tried go move around to line my character up with my enemies.