Mario vs Donkey Kong

Start off by crossing the bridge and dodging the jumping flames. Ride the drop block up and Hit the Blue Switch. Take the blue platforms up and stop where the blue blocks turn the other way. Jump and grab on to the chain and just reach for the Red Prize. Go back to the blue platforms and this time around keep jumping up. Go all the way left where you'll find a Key and a Red Switch. Grab the Key, hit the Red Switch and fall down to the platform below. Avoid the Blue Switch and ride the red elevator. Hop onto the red platforms to reach the top and you can take it from here.