I don't know where else to comment the grammar explanation for Accusative, so I'll do it right here, in the first example in this skill. Would somebody please change the following example in the "Tipps":
"Vouă nu vă place nimic." - The first pronoun isn't accusative, it's dative. So is the second, obviously. This can be very consufing for beginners, if even the introduction is misleading.
"El ne-a sfătuit ieri." - I'm going to take a wild guess and say that neither this one is accusative. I will stand corrected, if necessary.