On the last part where the bananas are, go over to the switch and push it. Then go down
onto all fours (circle) and run along the ice to the wooden box. Jump up, then onto the
metal box. Jump from that onto the bananas nearest to you. Go over the rope onto the other
side, so you are on other bunch, on the same rope at the same level. Then hop across, do
the same, hop back to the next level up, and so on, until you are at the fan. Collect the
mushroom and kill the spider. Jump onto the fish crates, then onto the metal pile, over to
the wooden pile, and collect the last mushroom. Then hop down, speak to the rat, and
you've collected all the mushrooms!! Hope this helps, I found it difficult too, just keep
trying, and be as quick as possible. :)