This was a unique idea! Definitely stressful to have to shoot all the fruit as they're falling, so good gameplay!
A couple of minor suggestions: Maybe add an outline to each of the fruit that corresponds with the color it was supposed to be. I felt like I struggled to determine what was supposed to be what sometimes (unless it was the banana, cause who can't recognize a banana by it's shape). Also, although the pause menu for changing paint color was useful, it also made gameplay a bit too easy. If you changed it where you could change color by scrolling or maybe each color corresponds to a key on the keyboard, that could also make for more interesting gameplay.
Overall, great idea and concept here!