Hint :
Special move:
Quickly collect five cogs to get one letter from the word "SPECIAL" in any level. Keep collecting cogs until the entire word is spelled out. Complete the level to learn a special move.

Defeating Merlock:
When one part of the floor shakes, go to the other part of the floor and dodge the fireballs. The pin-like things being shot from the front are harmless. When he splits up into four forms, hit the one whose pendant glows and repeat. Use caution because the less energy Merlock has, the more floor tiles fall into the lava.