I found this indie game to be quite a nice change of pace. It's a nice little time killer, and for me was quite addicting. It's a bit old school retro style reminds me of the flash game gammaBro's which is another fun little game. Anyways it can be downloaded for free at
http://www.pugfuglygames.com/Game.php?game=13 and is freeware, not shareware.
It can get a little hectic though, but trying to beat your top scores gets quite tough.
