Hey congrats on a successful submission, as Mary said, I found I didn't use the ghost lure either as it was easier to just dodge.
One thing that might be cool is add much more rocks, and have it so that the fish that are attached to the lure also become ghost, BUT add how long you can hold the lure down per attempt, something like 2 secs, this way you'd get the best high score by using the lure mechanic effectively, I wouldn't imagine it would take to long todo!
Either way this game has me thinking now :) So well done!