Thanks so much for the feedback!
My goal was to get the player to drop the fruit in the water and notice that eventually at some time the fruit disappears from the water. They can keep retrying dropping fruit in the water until they isolate the exact time the fruit disappears, and at that time ... *something will appear*.
Finding suitable puzzles for this game mechanic was definitely a challenge! If i had more time I definitely should have nestled more hints/time-specific events in.