The many pitfalls of Footlight Lane are spanned by invisible bridges that light up when you step on or near them. A Thwomp slamming down on them, or you ground pounding on them, can light up larger portions of the bridges.
You can find an invisible ? Block containing a Super Star just past an invisible set of steps protected by two Thwomps. Clear out the Parabones on the nearby winding pathway.
Green Star #1
The Green Star #1 is in plain sight beyond the swarm of Parabones, but you have to jump over a small gap to reach it.
When you reach the section with spiked rollers over thin air, it helps to use the ground pound to light up larger portions of the pathway.
Green Star #2
The second Green Star is found after doing a dangerous collection of Green Coins over a lane filled with spiked rollers.
Stamp
After passing over a walkway being fired on by Bill Blasters, you reach a temporary safe platform with a glowing spot on it. Ground pounding it will earn you some Coins, and will also alert you to an invisible set of steps to the right that you can climb to reach the Stamp.
The pathway away from the Stamp leads you past a number of Bill Blasters firing Cat Bullet Bills. As with standard Bullet Bills, their explosions reveal large sections of the pathway. The Boomerang Power-Up makes this section much easier!
Green Star #3
A small detour on this last section of invisible bridge takes you to a Mystery Box bonus room. In here, you have 10 game seconds to use a Thwomp to climb up to the Green Star’s ledge. You can see the invisible walkways once the Thwomp drops down.
Stamp
This Sprixie House becomes available after you beat 8-4.