Tunnel of Lava!
The player must jump on the Mechakoopas to find the one that swallowed the key. The Mechakoopas constantly rotate in a circle and move in and out; occasionally, they will turn red and breathe fire, and touching the Mechakoopas or their flames will stun the player temporarily. If the player finds the correct Mechakoopa within 30 seconds, they win.
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