Hard Mode

Hard Mode unlocks after beating the Final Boss once, and remixes the whole well: enemy spawns are denser, enemies arrive a stage earlier than usual, Shop prices double, and each area gains its own twist.

Changes by area

• Caverns — extra spawns, and the Eyefish: a bullet-immune floater that must be stomped.
• Catacombs — every spike trap fires simultaneously on a fixed rhythm instead of when stepped on.
• Aquifer — no air-pot doodads; loose air bubbles hang scattered in the water instead.
• Limbo — enemies from all the earlier areas drift in alongside the locals, and the layout wraps around the screen edges.
• The Abyss — the Final Boss fires an extra spread with every attack.

Hard Mode has its own set of records and achievements.