You enter a maze surrounded by indestructible walls. Your goal is to find the key, hidden under a stone block, then locate the door, also concealed beneath a stone block, and advance to the next level.

To destroy blocks, place bombs — they explode after 3 seconds, clearing stone blocks in straight lines. Destroyed blocks may reveal bonuses that increase your bomb blast radius.

Enemies patrol the maze, but no more than two chase you at once. They avoid bombs, push each other away on contact, and grow faster with each level.
You have 666 seconds to complete each level. If time runs out, you lose one life. You start with 3 lives. Upon death, you respawn safely in the starting zone, and nearby enemies are teleported away.