Just had a completely ridiculous solution to 3-2 i wanted to share (still amazed it worked):
Still can't believe something this outlandish worked.
I put 4 angels above the lava area, they kinda hovered there bumping into eachother. i put two boards on top of them so that they took up the entire space above their heads. I equipped the main character with a spear and ran across and tripped the wire. The star fell, encased in ice, on top of the board (the angels holding it all up). I ran across and quickly speared the ice and got the star, just before i pummeled into the lava.
Still can't believe something this outlandish worked.