Loof and the Troll


Hint:
The Troll is guarding the secret.

Full Solution:

Step on the collapsing bridge and back off, then use the four metal block to create two bridges across the lava. Push the boulder left and then down along the grey path to leave it on a hidden button. Use the crystals to explode the wood blocks/powder keg to collect the coin. Ignore the next set of two metal blocks and move to the conveyer. Use the reflector to destroy the chompers across the lava, and move to the upper left to collect the key near the gold star, using a wood block to eliminate the flame. After the chompers are eliminated, use metal blocks to cross over to the right. Move downward past the Troll's house and move quickly down to avoid UFO fire. Use a reflector as a stop so that you can push the boulder down directly to the left of the blue button. STOP, do not push the boulder onto the button until you are ready. Now use the reflectors to eliminate the flames. Then push the powder keg up next to the wood block near the key. Now push the boulder onto the blue button and move out of the way. The "Troll" (Kaboom!) will move around and explode the powder keg and wood block. If you have gathered all the keys and pushed the first boulder onto the hidden button, you can now collect the final two bonus coins and a transporter to the gold star inside the house.