how to freeze a zebra balloon without the lvl 3 specialty building: get an ice tower with 'snap freeze', wait till a round with rainbow balloons and let a rainbow balloon get frozen.
@cxxccxxc do you mean turrets? (not turrents) I also disagree with putting turrets into creeper, cus from what i remember they are destroyed quite quick. I would recommend not listening to cxxccxxc's advice and just trying to keep the creeper away from your stuff... and listen for a sssssSSSSSSSSsssssing, cus then ur in trouble. basically, ignore cxxccxxc, get turrets (without the n!) move them up slowly, killing all creeper. and be aware of noises!
kinda reminds me of platformer obstacle courses, but with a twist. dodging lava, detonating gas geysers, annoying immposible-to-jump-up bits can all really restrict movement and that means you have to think about whether or not to risk it for the last bit of titanium needed... very good game, but needs random events like a rare meteor impact which created a crater on the surface and stuff. its kinda getting boring, no longer any strategy to it. just dig, dig and dig. gets repetitive. ya need to fix the repetitive-ness!
 "Bloons TD 5"){kind=icon}
 "Creeper World 2: Academy"){kind=icon}
 "Super Energy Apocalypse : RECYCLED!"){kind=icon}
 "Learn to Fly 2"){kind=icon}
 "Everybody Edits"){kind=icon}
 "Glean"){kind=icon}