If you watched the Adventure Time 30m special, please help me understand it better. (If you understood it yourself!)

To my understanding:

The Lich (The King Lich) bombed earth with some sort of bomb that would horrify earth. The reason of which he did this I do not know. He is seen in one of Marceline's flashbacks walking out of the explosion of the bomb with some strange creatures by his side. All the figures are silhouetted, so you cannot see what they exactly are. The main one in the middle is obviously the Lich because he has the same horns on his head. These horns are also seen is other episodes containing the Lich. Marceline is for some reason an old lady in the episode, and is guarding the Ice King's body.**Simon Petrikov, aka the Ice King, defended earth by freezing the bomb (from the Lich) while it was falling using his ice magic knowledge. Also in the episode planes are seen, and I guess the planes dropped the bomb. Simon got trapped under the bomb and died. According to Marceline, *the Ice King's crown froze the earth for 400 years, grieving the ice kings's death.*

Finn has a wrench as an arm in the episode, I am guessing this was the past earth before...whatever happened. Finn took the Ice King's crown, which magically granted him the ability to use ice and snow at will. He used this power to attack the 'Destiny Gang' who was torturing the town Finn lived in. While Finn shot ice at the ground, the bomb became lose from the ice and exploded. Jake somehow fell into the residue in the crater of the bomb. A skeleton was hanging onto Jake while Finn pulled him out of the waste. "I warned you..." the skeleton said before Finn kicked it off Jake. I am guessing this is Marceline, who told Finn that either because a. The crown possesses evil power or b. The bomb was terrible and should not have been set off, or c. both of them.*

Maybe Jake got his powers from that residue in the crater, because he was a regular dog in that episode, which was the past earth. Actually never mind because Jake turned into the Lich 5 seconds later and attacked Finn.

Other episode clues:

1. The bear episode. In the end of this episode, the bear brings the Enchiridion that Finn gives him too him to a snail. The snail laughs and says in the Lich's voice, "We are one step closer." This snail is also seen in Finn's nightmare when it transforms into the Lich and kills Billy. Billy (secretly the lich) says he found the book in the mouth of a bear, and the bear gave it to him in this episode.

2. The song episode with the Ice King and Marceline. In this episode, Marceline finds a note written about her talking about how they stuck together when earth was going through chaos.*

Crazy theory (as if this isn't crazy enough)

The bomb dropped when the Lich wished for the extinction of all life, so he went back in time. Actually this is questionable because if Jake wished for this wish not to happen, earth would be normal and Finn and Jake would not returned back to the regular Adventure Time Ooo.

Completely confused points:

1. Why the Lich was is Finn's realm if he wished it didn't exist

2. How is the Ice King alive

3. What about Marceline too

4. WTF I DON'T GET A LOT OF THIS... HALP!!!