As always, get your CW2 update here:
http://knucklecracker.com/creeperworld2/patches.php
This update brings a minor bug fixes and one small but interesting feature. You can press "R" to see through the terrain. This will let you focus on your enemy (that would be the creeper) as well as find any entombed creeper easier. It's a small feature, but a nice one I think.