There are 3 vehicles that are easy to get and can fly in this game. (enter a vehicle by pressing 'F')
They are:

1. The UFO
   The UFO is probably the best vehicle to get as it is very easy to maneuver and you cannot crash it.
   So if the UFO is available you should be going for it first.
   
   
   
   
   
2. The Plane
   It is quite easy to crash the plane so take care when you are flying.
   
   
   
   
   
   
   
   
3. The Bomber
   It is also quite easy to crash this so take your time.

Fly to the beams shown in the picture above. Park your vehicle up there you may want to move beams. This is also an excellent spot to use the unicorn.

An alternative to using a vehicle to get up to the top beams players can go tank or ninja and use the trampoline to get up to the closest beam to the trampoline. Once at the high point of the trampoline jump players can either double jump as ninja or grapple as tank to get up to the beam. This however puts you in a far away spot from the unicorn and may make it harder for you to unlock the gate.

The flying key is the key that you need to open the gate that blocks you from getting the unicorn. To pick up the key you must be out of your vehicle, you do not need to press 'F' on the key to grab it just simply run into it. Once you have the key do not press 'F' or you will drop it and the key's flying route will change to one where it is much harder to get the key.

Now that you have the key simply run into the gate whilst holding the key to unlock the gate. Once the gate is unlocked the key will dissapear.







Now that you have unlocked the gate simply press 'F' to mount the unicorn the same way you would with any other vehicle.

Once you have the unicorn your priority should be to fly back up to the beams where you got the key. This is because up at the beams santa will have trouble shooting you. To fly up press 'W' and the spacebar whilst looking up.





Now that you are at the beams and safe from santa simply charge up your laser by pressing left click move out of cover and aim at santa. Once you have finished firing simply move back behind cover. However if santa doesn't notice you and isn't shooting you stay where you can see him so you can deal more damage. The unicorns laser does a lot of damage but you can still be killed, as long as you remain behind cover when the cooldown period of your laser is activated you will be fine.

Thanks for reading