Achieves its goal - nothing special.
The gameplay is very simple. There is no variation in gameplay or difficulty. More items do not start falling over a certain amount of time, objects do not get more difficult/easy to see or anything else. It's just the same, non-changing game for the entire duration of the timer.
The only challenges that arise are when certain objects obscure others, making clicking a tad more difficult and the size of the bad objects. The vampire teeth, being the smallest, were the most difficult to click.
I also found some of the good items a bit jarring at first, grabbing my attention to click (namely the Red Candy). I also forgot to click on the pumpkin when the game first started because I like Jack-O-Lanterns. But, then again, that's not your fault since you clearly state the good and bad objects.
The core game was executed well, but there wasn't enough to keep me coming back to play again.