I like the game and it's concept, it is rather fun and I think it has potential, but it has some glaring issues that really dampened my enjoyment. I'll go over pros and cons
Pros:
Good presentation (I love the christmas tree and little elves!)
Good sound design
Just fun to play, it is satisfying.
Cons:
The lag becomes immense and makes the game nearly unplayable in later stages, a bottle rocket always guarantees a lag spike and I've had to replay levels more than I should have
Little to no indication of where the airplane elf and ground elves are, it can make things really difficult, I'd suggest adding a little moving icon or a magnifying glass thing of sorts
There isn't a way to gain height, this really becomes an issue when I have a bulb that is just slightly out of reach, when the spinners are low to the ground, I am stuck with an elf that can't go high enough to hit the last couple that I need, making me do it all over again.
The area of effect for the sound of completing a level are too high, leading to me hitting an elf right near the ground and getting the victory or loss jingle even though I did not finish the level.
I'm able to hit X constantly at the title screen, making several elves in airplanes needing to spawn before mine shows up, I know this isn't an issue if you simple do not do it, but I feel people will find themselves spamming the button regardless.
Hitting confirm during the victory jingle activates the begin level jingle which makes them play at the same time. It gets rather annoying, I suggest programming it so that the game stops the victory jingle after you press continue and then it plays the beginning level music.
Overall, with some polishing this has a good bit of potential. Cheers and Happy Holidays!