A first date goes from zero to one hundred with an evening in a theme park. Sydney becomes the backdrop as the couple explore the city, doing and talking about everything you shouldn’t on a first date.

Hello,
for me this logline is too vague even for a mumblecore movie.
A boy meet a girl, they talk. Where's "the thing" ?
I suggest you to try to write the logline for "before sunrise" and "midnight kiss", try to analyze those movies and find what makes them interesting.

Is this a logline for a short, a full-length feature film?

In terms of?a plot, the story line goes from zero to.... zero.? There's no indication of an inciting incident, no sense of?conflict, no hint of a dramatic question, no stakes.

Is this a logline for a short, a full-length feature film?

In terms of?a plot, the story line goes from zero to.... zero.? There's no indication of an inciting incident, no sense of?conflict, no hint of a dramatic question, no stakes.