Where's the red key at, guys?
In the box with the green lock.
And how to get green key?
Make sure you're human, go up the green tube, Down, Right Right. Stop here and read this right now.
In the next room, you CAN die if you are not fast enough. You need to click the switch on the right side of the next room quickly.
Go right, and quickly press the switch.
Go and turn into a
'bunny' and navigate your way back to that spot again. Go right again and you'll see a box with a yellow lock on it.