Funny keep-away game, reminds me of the one where you just flip the light switch. Seriously though, we've all had some kind of experience like this...that elusive item that we just can't get a hold of. For feedback, may have fit the game better for the leaf to fly away from the mouse as it got close...and not even click on it. Some background music and sound effects could have added to the mood...and reinforced the frustration.
You got me!