All Collectibles in order as they appear. The characters used are just examples. Of course, you can use whatever character you like with the according abilities ;-) :
Part A: Starkiller Crash Site
Shoot 5 sentry droids
Build a "stomper" vehicle, board it and get rid of the snow piles.
Build a snow man and use it to climb to the platform at the back
Use the hatch, get inside the cave and cut out the Minikit with the lightsaber
Part B: Starkiller Wall
Build 4 rebel flags
Build a hair dryer
Melt the ice with a Flametrooper (you need to buy him first)
Part C: Starkiller Shield Room
At the start, use the force on that leaky container.
Hover up to the left. The Minikit is on the ledge.
Before the shootout at the end, use the force to get into the room to the right.
Shoot 4 mouse droids in the shootout.