I Picking from among a restricted set of options doesn't indicate free will at work.
Why not? If you can choose an option even if it's limited, you still have freewill. You're free to choose, to exert your will. If not you're a robot controlled totally in the hand of a creator. Maybe that's what we are. totally controlled by the gods. Maybe I just don't know what freewill means.
A few lines of computer code are the same thing. If this condition, do that. Else, do the other. A bubble sort is another example.
The constraining factors on us are physical laws. We can't freely break physics by our acts of will, thus, the universe is deterministic for us. This is particularly true for our acts. Our imaginations are less restrained but we're still selecting from a limited set of learned combinations of effects, even if it is from far less restricted range.
The act of selection itself doesn't demonstrate free will, just an attempt at this or that expected outcome.