Thanks for the feedback. Yeah, it would have definitely tracked more reliably using a controller, and you wouldn't have needed to remember the hand gestures. But for this jam, my personal goal was to play around with the new XR Hands Unity package. For a post-jam version, I'd definitely add controllers, or do more where hand tracking adds more gameplay value.
For the jam, I was originally thinking of having the player swing their index finger and pinky finger to make the duck waddle. But I found that detailed hand tracking on the Quest 2 is so unreliable currently, especially when one finger obscures the other, or when the hand isn't at optimal angles, or when lighting is not good even. I wonder how good the hand tracking will be with Apple Vision Pro or Quest 3.