At the start, go back up the stairs. The Minikit is hidden in the entrance.
Fly over to the back of the cave and blow up the golden bell with Heat (e.g. Ironman)
At the front right of the cave, there is a silver dragon. Use Silver Lego Blowup (e.g. Ironman) and put together the pieces.
At the bottom of the cave, there are some living skeletons. Use Mind Control (e.g. Doctor Strange) on the one close to the dragon. Then walk him to the prison at the back. There, use Mind Control on the other skeleton to pick up the Minikit.
Character in Peril (Stan Lee)
He's at the upper left inside a building. Use someone who can cut vines (e.g. Squirrel Girl) to free him.
Fly up to the right. There are 3 gongs. Hit them in the colour pattern provided: Blue, Red, Green.
At the bottom back of the cave there is a Ying-Yang sign. Use Time (e.g. Doctor Strange) and turn time so you get 2 targets. Shoot those and use Time again way to the other side to pick up the Minikit.
Over to the boss fight. Go all the way to the front (entrance). The Minikit is there in the open.
Find and destroy 5 green eggs inside a nest.
To the right, there is a dig site (e.g. Black Panther). Dig up a golden treasure chest and use heat (e.g. Ironman) to open
To the left, extinguish the fire with shield (e.g. Captain America)
Token: Colleen Wing
To the right, there is a little bag on the floor, where you can use Telekinesis (e.g. Doctor Strange) . Build a Gravity Mine point (Star-Lord) and use it to get the token.