Enter a world of darkness, where rainbows are replaced by fire and brimstone, skillfully navigating the platforms that stretch unending through the deepest depths of the underworld. Collect imps as you go, leaping majestically from island to island and dashing through the perilous pentagrams that block your way. You have but three tries. Failure is inevitable. How to Play: How to Play:Robot Unicorn Attack Heavy Metal is played with the keyboard. Z – Jump. The longer you hold the Z button, the larger the jump arc. You can jump again in mid-air by pressing the Z button again. X – Dash. Use dash to break through pentagrams that are in your path and score points.