Then you have a fun programming challenge.

Add a click event listener to the body and overlay the event-coordinates on the canvas.

Will the canvas allow you to hit-test the confetti piece given the coordinate?

Canvas draws raster images, anything resembling an object in your drawing logic is already tracked separately by necessity. So regardless, you’d presumably check against whatever data model you’re using to determine what to draw.

By what time the user clicks, there's no reason for the program to need to remember what they drew where.

If that’s the case, what other object with coordinates would you reference on a canvas to determine whether it was clicked?