Pretty awesome! Two quick things though. One, Danke is German. Two, I think you may be a bit repetitive when Ada starts ranting in her mind about disliking the fact she doesn't understand Feliks. They've barely met, and if she's very good at judging facts about people, you might explain the things about Feliks she notices as you go along in the chapter. It might feel less spontaneous if there are more concrete reasons for her dislike. At least, more than him liking paluszki. And the fat comment. That part was a tad confusing as well.

Very funny! Has tons of potential!

Love the jabs at the girl both of them hate! I know a girl like that so I get a personal pleasure out of it.

Oh, and I can confirm it as a fact. Pierogi are much better than Paluszki.