If you look carefully, when cutting, you can see on the board ti the left of the pizza in the middle of the board is a faint mark (from when there's nothing on the board) which you can use to cut horizontally perfectly. That's how I get 100% cutting!
Cells level: quickly create a big network of collectors then build a single blaster for the 1st and 2nd section at the opening, so creepers can't come out. focus on the 3rd section:add a mortar with a few blasters. build a few more blasters, and move the original weapons up a bit, then build a relay to get the totem. Leave the 3rd section as it is, and build LOAds of collectors. Once you've done this, do the same thing for the 1st section as what you did to the 3rd one (in other words, just focus on the 1st section now, attacking it bit by bit). Once you have the left and right totems, build collector crazy until the whole screen is almost green (yes it's timewasting, but worth it) and then add a couple of mortars and loads of blasters to the middle 2nd section, but do this slowly as not to starve. This should push the creepers forward slowly. Ignore the hole in the middle and go round, addinng blasters bit by bit till you get close enough to use a relay to get the totem.
Super easy (but long) way to get the medium badge: The map doesn't matter particularly, but you need a combo of lasers and rockets so that blue missiles are created. With just one of the i pressed the 'next wave' button about 10 times and I easily destroyed all enemies. Now i'm on wave 210 with 2103 kills and still going strong! I've got about 4 of those missile combos and my screen is filled with missiles with lasers!
all my creatures started getting these random effects which other creatures should have. My abomination got 'poison', and my minor vampire got 'deja vu' lol