Very nice work!
I liked the old-school aesthetics. Made me feel like I'm playing an Atari game :D
The last puzzle was kinda confusing to me. But I figured it out in the end!
I'm glad you liked it.
Yeah the last puzzle I needed a few more tests with it. As it is now, the player loses sight of the path to continue while pressing the switches. Also I didn't have the time to explore the mechaninc to call for help to the friend, where jumping makes the friend wait in place, so players might not get the "ask for help" part of the puzzle.