Love Creeper World.
I didn't have any issues with large amounts of creeper as some people in the comments though, bought the CW1+CW2 package a couple of months ago, had some training. ;)
On lvl8 for example, with the 1mil+ creeper pools, I use 4 Blasters (Max Range/Rate upgrades) and 6 Launchers. Takes care of it real good, while not costing too much power. 20-25 power gen usually get's me through levels.
PS. While making loads and loads of Reactors is a good thing, keep in mind your Liberation Ship can handle no more than a -60 Power drain. It simply will not go above it, unless you have reserves from crystals. (That might be an issue to improve, btw. On some Custom maps in the full version it would come in handy to have more than that)
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