The Wonderland Board

I can Kill the first two chompers, but the key only opens the first gate and then I'm stuck

Here is a hint:

Once you have killed the two chomps, go to bottom right of the level and have the righthand chomp come down to you and stand behind the wall and he will get on the right travelator and then the left travelator. Play run around the wall with him and get on that travelator he got off! Now you can open the gate on the right with the key and stand on the orange square button! Save your game here - you are going to have fun and games with the other part

Hope that helps!

I have the first part down it's the upper part with the red travelators and the chomper that i'm stuck on