I'm so sorry to go through this so fast. I quite literally tried so many takes and couldn't fit everything below 3 minutes if I had my character's normal running speed.
IE 1 - Fire hazard and pressure plate to lower it
IE 2 - Speed up power-up
IE 3 - Two switches to lower walls (wasn't sure if this would be counted as two)
IE 4 - Two switches to destroy kill volumes on cross (also wasn't sure if this would be counted as two)
IE 5 - Windmill blowing player backwards when touched
IE 6 - Petting the pig will disable the wind, letting the player pass
IE 7 - Talking to the man on the crocodile will make a bridge appear
IE 8 - Finishing game puts player in "creative mode", letting them essentially fly and making them impossibly fast and invincible