The Unusual DuoHelped Nulan and Haim to reach the exit in "The Unusual Duo"
This Bonus Level unlocks once you have collected all 60 collectibles in the game. The level is the "unusual duo" of Haim (left screen) and Nulan (right screen). You have to utilize their special skills while accounting for the constant shift in positions this creates. As you already know at this point in the game, make sure to do each sequence quickly.
Here is a video of it being done: