動じない心です!

is for clearing a level without physically moving/tilting the Vita at all (it needs to be held at a "neutral" position from start to finish) and たくましいです!

is for clearing a level while under the effect of the "Penetration" item, the one where the ball glows white and can plow through a bunch of normal blocks w/o bouncing back. I don't remember the requirements for that

off the top of my head, I'll have to check it out once I'm home from work tonight.