Tomb of Rites - Too many puzzles without guidance?

[sadness]

I am at the end game,and I love puzzlers and actually enjoyed this game has a focus on providing puzzles on top of the combat. However, I feel like I am stuck in 4 different puzzles in the Tomb of Rites area without any guidance. I get that the idea is making it challenging and I am not frustrated or anything, but maybe a really small hint could be helpful. Since I do not even understand the aim of the puzzles.

1) One puzzle is about fireball spitting head, I have no idea how or where I should lead this fireboi, should I make the floors appear first, if so how?
2) I hear a clicking sound when I step some tiles, could not figure out what they do yet.
3) One room with 4x4 tiles, no idea how to interact.
4) Teleporter room, again, no idea what even is the puzzle.

At least a little bit of guidance would help. Thoughts?

[RPG only]

1. open the serpent door (north) with your staff. There is a secret button right where the fireball hits the wall....
2. step into the light: 4 - 2 - 1 - 3 (from north to south).
4. the teleporter room in the south is a bit tricky: a.) make ready to use the serpent staff again and something you can throw. b.) wait until the wandering teleporter reaches the third or fifth tile (left -> right). c.) step backwards into the teleporter and be quick: turn left, fire the staff and throw something on the pressure plate behind the door. d.) If you fall down explore the room below and press all the buttons and switches. Step into the teleporter an try again. e.) opposite the teleporter is a door that should be open now. Grab the power gem and go to level 3.