I believe that every baby has their own schedule. My daughter doesn't like to play cars too. She knows a lot of instruction, but it's a matter of whether she feels like doing it in front of people. And that I don't count it as "she doesn't follow instructions" lol
don't worry. My older son also fail a lot of items in the 1-year-old assessment. I was depressed too.
He's now 4 years-old and enroled in a kindergarten (K2) which received 5000+ applications a year.
Though he's not outstanding (因佢地班好多大仔) but he's on the right track la.
Every baby grown/develop in his/her own way.