now the way you described sounds like you hadn’t tried putting each of them in different teleporters at the same time?
Is there a jump mechanic? I'm pretty sure I tried spacebar and other buttons to try to jump up but couldn't get either character to the top teleporter. Lemme know and I'll give it another shot later!
That's why I was trying to press e on each of the characters next to each other. I was guessing, maybe the big robot throws the little guy or something?