it's so funny to open a hole in a planet, go inside and watch as the missile spins circles around the middle before deciding to hit something and explode. It's even better when it's a nuke and the planet stops existing.
I love Mess Rush. I don't need to do any shifty gem-collecting, just spam the game and you can just get a whole bunch of LF3's and destroy. It's so fun. :D
Cells is easy once you get into the rhythm. Just rush out and build attack towers to stop the creeper getting out of the cells then focus on energy. Once you've pretty much filled the map, you can start attacking.