Its petty hard!
Considerably hard, but far from impossible.
"Ninja" medal is best tried on level 10 (cut 4-5 bubbles each time).
Last bonus level is available on YT, the sequence is 8-piece.
Fantastic game! The worst level for me was B5, but I did beat the crap out of it anyways. Waiting for the sequel...
Play Touch The Bubbles 4
damn you vsauce damn you
ps jk i lve vsauce
Nice, Vsauce brought me here!