To ask for things that started the moment you were born till now, use the present perfect; when you mention when the action happened, use simple past.
— "HAVE you ever EATEN Thai food?" (Meaning your whole life)
— "Sure, I tried it just last week..." (now you have the moment when the action happened -- last week).
You also use the present perfect fot things that have been happening for the past few days or something that has just happened:
- "I haven't been well lately" (past few days)
- "I have just bought my new apartment" (just happened).
You can't say " I haven't gone to the movies last Saturday", but "I didn't go..." (specific time)...
This is the reason why I would use simple past in Duolingo's example...