Playing Runner 2 with my colleagues at work. It plays pretty well.
We completed the first world when we played at work, and I'm perfecting the levels of the first world at home.
Did it. All world 1 levels perfect, and unlocked 'Every Cloud', where I got a new character, Unkle Dill, a weird green dude looking like a really stoned antropomorphic cucumber.
Completed world 2/5.
Figured out how to use blue paths to reach secret exits and unlock the extra levels in world 1 and 2. I unlocked the Key Vaults, and got all the secret stuff I could find in world 1. Also, I finally unlocked Reverse Merman, a half man, half fish monstrosity with dead fish eyes, humongous testicles, and flip-flops.